English If you're looking for the best characters to build in Star Sailors, this tier list ranks every currently available Battle Partner and Assist Partner based on their overall PvE performance, versatility, team synergy, and long-term investment value. Since Battle Partners and Assist Partners fulfill different roles in combat, we've ranked them separately to provide more practical recommendations for story progression, boss battles, farming, and endgame content. Whether you're a Star Sailors beginner , rerolling for the best characters, or planning your long-term roster, this guide will help you decide which Battle Partners and Assist Partners are worth investing your resources in.
If you're planning to reroll for top-tier characters like Heidi or Hunter K, OSLink can make the process much more efficient. With its Multi-Instance Manager and Synchronizer features, you can reroll multiple game accounts at once on your PC while controlling them remotely from your phone. This lets you reroll several accounts at the same time, keeps your phone's storage free, and takes advantage of your PC's performance for a smoother experience.
Star Sailors Tier List Overview
This Star Sailors tier list ranks every Battle Partner and Assist Partner based on their overall PvE performance, including story progression, boss battles, farming efficiency, team synergy, and long-term investment value. Rather than placing every character into a single ranking, we evaluate Battle Partners and Assist Partners separately since they serve different roles in combat.
Our rankings consider each character's:
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Overall Performance – Effectiveness across story stages, bosses, and endgame PvE.
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Team Synergy – How well they perform alongside popular team compositions.
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Utility – Damage, healing, shields, buffs, debuffs, and overall team impact.
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Investment Value – Performance with reasonable investment and long-term usefulness.
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Consistency – Reliability from the early game through endgame progression.
Battle Partner Quick Reference
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S Tier |
Heidi
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Nina
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Jen
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Kaira
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A Tier |
Ethan
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Erling
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Carat
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Iron
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B Tier |
Rak
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Soul
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Remi
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Assist Partner Quick Reference
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S Tier |
Hunter K
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Iris
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Nutty
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Jerry
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Sion
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A Tier |
Gerbil
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Mui
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Simo
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Nadia
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Caroline
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Ed
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Dora
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Star Sailors Battle Partner Tier List
Battle Partners are the core of every team, taking the frontline as your primary damage dealers, tanks, and support units. Their performance has the highest impact on clearing story stages, defeating bosses, and progressing through endgame PvE content.
The rankings below evaluate each Battle Partner based on their overall effectiveness, versatility, team synergy, and long-term investment value, making it easier to identify which characters deserve your resources first.
Star Sailors Battle Partner S Tier
S Tier Battle Partners are the strongest characters in the current meta. They offer exceptional performance with minimal drawbacks, making them the safest long-term investments for nearly every account.
Heidi
Role: AoE DPS
Element: Fire
Best For: Story Progression, Farming, Boss Battles, Fire Teams
Heidi is currently the standout damage dealer in Star Sailors and an easy pick for anyone wondering about the best character to build. She delivers massive AoE damage while reducing enemies' Fire Resistance, allowing both herself and other Fire allies to hit even harder.
Her real strength is consistency. Heidi performs well from the early game all the way into endgame, and her value only grows once mono-element Fire teams become a priority. If you're looking for a carry that can handle almost every PvE challenge, Heidi is one of the safest investments available.
Nina
Role: Single-Target DPS
Element: Earth
Best For: Boss Battles, Elite Enemies, Earth Teams
Nina specializes in one thing—deleting bosses. Her kit revolves around powerful critical hits, giving her some of the highest single-target burst damage in the game when built with enough Critical Rate.
While Heidi dominates groups of enemies, Nina shines against tough bosses where raw burst damage matters most. She scales extremely well with Attack and Crit buffs, making her an excellent centerpiece for Earth teams and one of the strongest Battle Partners for long-term PvE progression.
Jen
Role: Defender
Element: Fire
Excels In: Difficult Stages, Boss Battles, Fire Teams
Jen is the strongest defensive Battle Partner in Star Sailors, offering exceptional protection without sacrificing team momentum. Instead of simply absorbing damage, she redirects incoming attacks away from vulnerable allies, helping your team survive some of the toughest PvE encounters.
Her biggest strength is the synergy she shares with Heidi. Jen's defensive utility allows Fire teams to stay aggressive while keeping everyone alive, making challenging stages and full-clear objectives much easier to complete. If you're building around the current Fire meta, Jen is one of the most valuable frontline characters you can invest in.
Kaira
Role: Support
Element: Light
Excels In: Boss Battles, Long Fights, General PvE
Kaira is one of the most reliable support characters in Star Sailors thanks to her excellent balance of healing and team-wide buffs. She increases your team's Attack while providing consistent healing, making her a natural fit in almost any PvE lineup regardless of your main damage dealer.
Unlike many supports that only shine in specific team compositions, Kaira remains effective throughout every stage of progression. Her versatility, low team-building requirements, and long-term value make her an easy recommendation for players looking to strengthen their account with a dependable support that rarely feels out of place.
AFK Anywhere, Progress Anytime
Star Sailors Battle Partner A Tier
A Tier Battle Partners are dependable choices that perform well throughout most PvE content. While they don't offer the same overall impact as the S Tier characters, they remain worthwhile investments and can excel in the right teams or situations.
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Character |
Review |
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Ethan
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Role: Hybrid DPS • Element: Light • Excels In: Story Progression, Beginner Teams, Balanced Lineups |
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Ethan combines respectable damage with healing and shielding, making him one of the strongest free Battle Partners. His versatility allows him to fit into many early and mid-game teams, although he lacks the specialization of higher-ranked characters. |
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Erling
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Role: Defender • Element: Water • Excels In: Boss Battles, Defensive Teams, Elemental Debuffs |
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Erling offers solid survivability while reducing enemy elemental resistance to increase your team's damage. Her effectiveness is currently limited by the lack of powerful Water-focused team compositions. |
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Carat
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Role: DPS • Element: Wind • Excels In: Early Progression, Free-to-Play Teams |
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Carat is a reliable early-game damage dealer who performs well during story progression. While she eventually falls behind stronger SSR carries, she remains a great option for players with limited rosters. |
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Iron
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Role: Defender • Element: Earth • Excels In: Boss Battles, Taunt Strategies. |
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Iron's taunt ability gives him a unique niche in certain boss encounters where controlling enemy attacks is important. Although more situational than other defenders, he can still be a valuable pick in the right fight. |
Star Sailors Battle Partner B Tier
B Tier Battle Partners can still help you progress through the early stages of the game, but they are generally outclassed by higher-ranked characters. They work well as temporary options until you unlock stronger Battle Partners.
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Character |
Review |
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Rak
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Role: Defender • Element: Fire • Excels In: Early Story Progression |
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Rak is a dependable frontline defender during the early game but offers limited utility compared to stronger tanks like Jen. |
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Soul |
Role: DPS • Element: Fire • Excels In: Early Fire Teams |
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Soul provides decent early-game damage but struggles to keep up with higher-tier damage dealers as your roster grows. |
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Remi
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Role: Defender • Element: Earth • Excels In: Beginner Teams |
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Remi can fill the tank role while building your roster, but her overall utility is fairly limited once better defensive options become available. |
Star Sailors Assist Partner Tier List
Assist Partners support your team from the backline, providing buffs, debuffs, healing, and other utility that can greatly improve your overall performance. Unlike Battle Partners, they don't fight directly, but choosing the right Assist Partner can make a significant difference in tougher PvE content.
Star Sailors Assist Partner S Tier
S Tier Assist Partners offer exceptional value and can fit into a wide variety of team compositions. Whether you're looking to boost your team's damage, strengthen elemental synergy, or improve overall consistency, these are the best Assist Partners to invest in.
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Character |
Review |
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Hunter K
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Role: Buffer • Element: Earth • Excels In: Boss Battles, Critical Builds, Nearly Every PvE Team |
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Hunter K is widely regarded as the best Assist Partner in Star Sailors thanks to his powerful Attack and Critical Rate buffs. His versatility allows him to fit into almost any team, making him one of the safest long-term investments for every account. |
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Iris
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Role: Assist DPS • Element: Light • Excels In: Light Teams, Sustained Damage, PvE Progression |
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Iris provides consistent backline damage throughout battle, making her an excellent choice for Light-focused teams. She offers strong offensive support without taking a frontline position. |
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Nutty
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Role: Support • Element: Wind • Excels In: Chain Teams, Boss Battles, Critical Damage |
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Nutty specializes in boosting Chain-based teams by increasing overall damage and applying a powerful Critical Damage Taken debuff. She becomes even more effective when paired with burst-focused Battle Partners. |
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Jerry
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Role: Assist DPS • Element: Earth • Excels In: Earth Teams, Chain Damage, Boss Fights |
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Jerry combines solid backline damage with excellent Chain support, making her a valuable addition to Earth-focused teams that want to maximize their damage output. |
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Sion
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Role: Chain Support • Element: Light • Excels In: Chain Teams, Boss Battles, Light Teams |
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Sion specializes in strengthening Chain-focused teams by increasing Chain Mastery and providing additional Chain Bonus. His strong synergy with Light teams makes him an excellent support for players building around the Chain system. |
Star Sailors Assist Partner A Tier
A Tier Assist Partners offer reliable support and can perform well in the right team compositions. While they aren't as universally effective as the S Tier characters, they remain worthwhile options for players looking to strengthen specific elemental teams or fill key support roles.
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Character |
Review |
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Gerbil
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Role: Debuffer • Element: Light • Excels In: Boss Battles, Light Teams, Chain Compositions |
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Gerbil specializes in weakening enemies by increasing the damage they receive while also reducing their Resistance. His strong debuff utility makes him a valuable support for Light teams and other damage-focused compositions. |
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Mui
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Role: Support • Element: Wind • Excels In: Sustained Battles, Defensive Teams, General PvE |
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Mui provides reliable healing, defensive buffs, and debuff cleansing to help keep your team alive during difficult encounters. Her versatile support kit makes her a dependable choice for teams that value survivability and consistency. |
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Simo
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Role: Debuffer • Element: Wind • Excels In: Boss Battles, Wind Teams, Resistance Reduction |
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Simo specializes in lowering enemy Resistance, allowing your team to deal increased elemental damage throughout battle. His consistent debuff application makes him a solid support for Wind teams and prolonged fights. |
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Nadia
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Role: Debuffer • Element: Water • Excels In: Boss Battles, Chain Teams, Damage Support |
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Nadia increases the damage enemies receive through her stacking debuffs while also providing valuable Chain Bonus support. She performs best in teams that want to maximize sustained damage against tougher enemies. |
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Caroline
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Role: Debuffer • Element: Fire • Excels In: Fire Teams, Boss Battles |
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Caroline weakens enemies with valuable debuffs, making her an excellent companion for Fire-focused teams. Her effectiveness increases significantly when paired with powerful Fire Battle Partners like Heidi. |
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Ed
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Role: Support • Element: Fire • Excels In: Fire Teams, Team Buffs |
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Ed provides useful support for Fire compositions by helping teammates deal more consistent damage. Although more specialized than higher-ranked Assist Partners, he remains a solid choice for Fire-centric teams. |
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Dora
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Role: Healer • Element: Light • Excels In: Early Progression, Budget Teams |
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Dora is a dependable low-investment healer whose recovery scales with allies' maximum HP. She offers excellent value for newer players who need reliable healing without investing heavily in support units. |
Star Sailors Best Character to Build
Not sure which character to invest in first? These quick recommendations highlight the best choices for different playstyles and team-building needs in Star Sailors .
Best Character Overall
If you can invest in only one Battle Partner, Heidi is the safest choice. Her outstanding AoE damage, Fire Resistance debuff, and excellent scaling make her one of the strongest long-term investments for almost every PvE activity.
Best Character for Boss Battles
Nina is the premier single-target damage dealer in Star Sailors. Her powerful burst damage makes her the ideal choice for taking down bosses and other high-health enemies.
Best Support Battle Partner
Kaira is one of the most versatile support characters thanks to her reliable healing and powerful team-wide Attack buff. She fits comfortably into almost any team composition and remains valuable throughout the game.
Best Defender
Jen is the strongest defensive Battle Partner, keeping your team alive by protecting allies and making difficult PvE stages much easier to clear.
Best Assist Partner
Hunter K is the best overall Assist Partner thanks to his outstanding Attack and Critical Rate buffs. His versatility allows him to strengthen almost any team, making him one of the safest long-term support investments.
Best Free-to-Play Character
Ethan offers exceptional value for a free Battle Partner by combining respectable damage with healing and shielding. He's an excellent choice for new players who want a dependable all-rounder without relying on limited summons.
Conclusion
Building a strong team in Star Sailors is about more than choosing the highest-ranked characters—it's about combining Battle Partners and Assist Partners that complement each other's strengths. Heidi, Nina, Jen, Hunter K, and Kaira remain some of the safest long-term investments for tackling every stage of PvE, and we'll continue updating this tier list as new characters are released and balance changes reshape the meta. If you're aiming to start with the strongest possible, OSLink lets you reroll multiple accounts simultaneously, making it easier to keep the best results and continue managing and progressing multiple accounts on the go.
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