Stella Sora splits each team into one active main and two supports, so a Trekker's value swings with the role you hand them and the element you build around. As of version 1.4.0, Firefly is the newest face on the recruit banner, joining recent additions like Otoha, Snowish Laru, and Springseek Coronis. The rankings below reflect that current state of the roster and tell you who actually carries content versus who fills a bench slot.
Stella Sora tier list (version 1.4.0)
The roster ranks across all content rather than a single mode. Five-stars sit higher overall, but several 4-stars stay relevant deep into the game, especially when they match your main's element to trigger elemental weakness. Treat the bands as investment priority, not a hard wall.
| Tier | Trekkers |
|---|---|
| S | Shia, Fuyuka, Nazuka, Chitose, Gerie, Nazuna, Minova, Nanoha, Chixia, Ann, Firefly, Otoha, Snowish Laru |
| A | Freesia, Mistique, Tilia, Cosette, Flora, Ridge, Jinglin, Teresa, Amber, Donna, Wraith, Firenze, Springseek Coronis |
| B | Kasimira, Iris, Noya, Shimiao, Coronis, Canace, Caramel, Laru |
S-tier Trekkers and what they do
These units anchor the strongest rosters and should be your top targets when summoning or rerolling. The table covers class, element, and the role each one fills best.
| Trekker | Element / Class | Role notes |
|---|---|---|
| Shia | Lux Vanguard | Top single-target DPS; drones focus targets and her Ultimate drops a wide orbital barrage. High mobility and field control. |
| Fuyuka | Ignis Vanguard | Fast combos with a bullet ability that boosts basic attacks. Strong against waves and bosses, and the best lead for mono-Ignis. |
| Nazuka | Ventus Versatile | Wide AoE, enemy slow, and Ventus marks. Her whirlwind Ultimate covers nearly the whole field. |
| Chitose | Aqua Vanguard | First limited unit with a 6-move combo and Chill on both skill and Ultimate for speed control. |
| Gerie | Terra Vanguard | 5-move combo that links two enemies in a damage field and buffs her auto attacks. Strong reliable PvE pick. |
| Nazuna | Terra Support | Squad-wide buffs plus extra damage. RNG raffle buffs perform best on mono-Terra teams. |
| Minova | Lux Versatile | Balanced main attacker who also gives backup support damage, useful in nearly any setup. |
| Nanoha | Ventus Vanguard | Simple 3-move combo with an Ultimate that summons two turrets for sustained pressure. |
| Chixia | Ignis Versatile | Summon-based coverage and a lock-on Ultimate. ATK runs a little low for a 5-star. |
| Ann | Ventus Support | Boosts squad ATK by up to 66% and summons a creature that adds another large ATK buff. |
| Firefly | Recruit banner addition | Newest unit in 1.4.0 and a high-priority pull. |
| Otoha | Umbra (5-star) | Added alongside Umbra-element boons, a strong fit for dark-element cores. |
| Snowish Laru | Limited variant | An upgraded take on Laru that lands well above her base 4-star. |
A-tier Trekkers worth building
A-tier units either bring excellent utility or shine on their matching elemental team. They won't always headline, but they hold up across story, trials, and most challenge content.
- Freesia (Aqua Versatile): Her Ultimate triggers a 20-second Berserk ATK buff and shortens her combo to a punchier 3-move chain, with Chill on the side.
- Mistique (Umbra Versatile): Summons creatures through her skills and an AoE Ultimate, though her standard combo is weak.
- Tilia (Lux Support): A 2-second stun that's great on bosses, plus a Fortify Stance for survivability.
- Cosette (Umbra Support): Her debuff makes targets take roughly 60% more Umbra damage, so she's built for mono-Umbra teams.
- Flora (Ignis Support): Grants Crit Rate and Crit DMG to the main unit and lays down an Ignis damage-over-time zone.
- Ridge (Terra Versatile): The best 4-star. Her support skill lets the whole team trigger Terra mark damage, and Bean Cyclone slows targets.
- Teresa (Aqua Support): Shields the active main and adds a bonus Aqua damage field, ideal for boss fights.
- Jinglin (Lux Versatile): Boss-focused damage; her Ultimate hits random enemies, so she's weaker against groups.
- Amber (Ignis Vanguard): The free starter who stays useful thanks to burst AoE and solid Ultimate multipliers.
- Donna, Wraith, Firenze, Springseek Coronis: Newer additions that round out the A band and slot into their element cores.
B-tier Trekkers
These are replaceable picks. They carry early progress or fill a specific elemental niche, but they fall off once you build a stronger core. Don't overinvest unless you plan to use them as situational supports.
- Shimiao (Aqua Vanguard): A 6-move combo and two-phase main skill with Chill, but unremarkable for late-game scaling.
- Iris (Aqua Versatile): Decent damage with a Chill chance that isn't reliable against bosses; spread thin across roles.
- Caramel (Umbra Vanguard): A self-buffing damager with damage over time, a fine budget option if you're stuck with 4-stars.
- Kasimira (Ignis Versatile): Provides constant cover Ignis damage but little else.
- Noya (Ventus Vanguard): A reliable beginner damager with a 4-move combo and good ATK for a 4-star.
- Coronis (Umbra Versatile): Minor crowd control; useful mainly when stacking Umbra with same-element allies.
- Canace (Ventus Versatile): Applies Ventus marks and a DoT buff worth about 62% of her ATK to the main's target.
- Laru (Lux Vanguard): Solid 4-star damage output, held back by a support skill that lands in random spots.
Best reroll targets in Stella Sora
Aim for a high-tier 5-star paired with a useful 4-star in the same pull. The standout names to chase are Gerie, Nazuna, and Ridge, plus any S-tier 5-star main and any strong A-tier 4-star. Landing a main DPS and a matching-element support at once gives you a working mono-element team right away, which matters more than raw rarity.
How to reroll in Stella Sora
You get up to 20 free rolls, and you can save as many as five of those pulls before committing. The flow mirrors the free-roll system in games like Epic Seven, so a clean reroll only takes a few minutes once you know the loop.
Step 1: Open the game and log in with a Guest account, skipping verification for now. Play through the tutorial until the recruit banners unlock.
Step 2: Use your free rolls and save up to five of the best pulls. After finishing all 20, pick the saved set that contains your target Trekkers.
Step 3: Keep playing until the mail function unlocks, then claim the rewards there for extra gacha tickets you can spend immediately.
Step 4: If you still missed your targets, open the menu in the top-right corner, go to Settings, then Account, and select Log Out. Clear your game data and sign back in with a fresh Guest account to start over.
You'll know the reroll worked when the saved pull you select appears in your roster, and the characters are added to your account. The most common reason a reroll "fails" is logging out before claiming saved pulls or mail rewards, which wipes the tickets you'd otherwise carry forward. Once you land a main plus a matching support, verify your account by linking your email so the progress sticks.
You can grab the latest build from the App Store or Google Play before you start rerolling. Expect this ranking to shift as Yostar adds new Trekkers and rebalances existing kits, so revisit your team whenever a fresh banner lands.