Stella Sora Willow: Best Support Build and Team Guide

What Does Suntide Willow Do in Stella Sora?

Your Aqua damage dealer gets more room to shine when Suntide Willow handles the buffs. This Stella Sora Willow guide focuses on her five-star Aqua support kit, which brings attack boosts, critical bonuses, and element-specific benefits to your squad. Build your Stella Sora Willow team around those strengths, and you can keep your main Trekker focused on dealing damage.

Suntide Willow is the swimsuit character listed under that name in the Trekker roster. Her support build centers on improving the squad’s damage through her support skill, ultimate, and potentials. She also deals damage herself, but her buff-focused setup gives you a clear direction when choosing between her two potential builds.

Character detail	Suntide Willow
Rarity	Five-star
Element	Aqua
Recommended position	Support
Support mechanic	Decibels influence her squad buffs
Build focus	Attack, critical bonuses, and Aqua damage support

Her kit has particular appeal alongside an Aqua main Trekker such as Chitose. Several benefits specifically interact with Aqua damage or Aqua teammates, so squad composition matters when deciding how to use her.

Teresa also fills an Aqua support role, but Suntide Willow offers a stronger offensive support option in the Boss Blitz comparison behind this build recommendation. That makes Willow worth considering when improving an existing Aqua team.

Keep the investment goal clear: strengthen the character carrying your damage. For this Stella Sora Willow build, choose the support position and prioritize potentials that improve the squad instead of automatically selecting every option that increases Willow’s personal damage.

Official page: Stella Sora (stellasora.global)

Skills and Decibels: Where Her Buffs Come From

Decibels sit at the center of Willow’s support skill. While she is on the field, different Decibel thresholds provide different squad benefits. Her maxed support skill includes an Aqua damage increase at the lower threshold and an attack increase at the higher threshold.

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Her ultimate adds another attack buff that stacks. Together, these effects explain why her support build puts so much emphasis on improving the team around her.

Skill component	Condition	Effect
Maxed support skill	Decibels at 40 or below	Increases squad Aqua damage by 29%
Maxed support skill	Decibels at 100 or above	Increases squad attack by 58%
Ultimate attack buff	Each stack	Increases squad attack by 11.5%
Ultimate stacking	Up to five stacks	Increases squad attack with each stack

Read the threshold conditions carefully. The Aqua damage bonus and attack bonus belong to different Decibel states; they are not simply two permanent bonuses you can assume are active together.

Likewise, keep the ultimate’s attack increase separate from the support skill’s attack increase when evaluating the kit. The ultimate has its own stacking behavior. Avoid turning every percentage on the character screen into one combined damage multiplier.

For your Stella Sora Willow setup, prioritize her support skill and ultimate when investing in the abilities used by this support build. Those are the two skills supplying the central squad buffs.

The second potential build also changes her starting Decibels to 70 and includes a 10% squad critical rate increase. That starting value falls between the two support-skill thresholds above, so do not mistake entering the field for immediately activating the 100-Decibel attack bonus.

Follow the Decibel effects as you select potentials. The build works through several connected bonuses, making the actual conditions more useful than a single headline percentage.

Best Stella Sora Willow Build: Support Potentials

Choose Build Two for a dedicated support setup. Its priorities match Willow’s role: improve the squad’s offensive stats, strengthen Aqua damage support, and give your main Trekker more help.

Image: Steam / YOSTAR HONG KONG LIMITED

Build One emphasizes Willow’s own damage through additional shots, area Aqua skill damage, and other damaging effects. That gives it a different purpose. For the team composition covered here, use the buff-focused route.

Potential or build feature	Relevant benefit	Selection priority
Build Two starting effects	Starts at 70 Decibels and adds 10% squad critical rate	Establish the support build
Prismatic Bubbles	Adds critical rate support and an attack benefit for the main Trekker	Prioritize
Receding Echoes	Improves critical damage support	Prioritize
Balmy Surf	Provides defense penetration tied to Aqua Trekkers in the squad	Prioritize for the Aqua setup
Tendencies	Increases squad attack by 42%	Include in the support setup

Prioritize Prismatic Bubbles and Receding Echoes

Prismatic Bubbles supplies additional critical rate support, including a listed 20% increase, alongside an attack benefit for the main Trekker. Receding Echoes supports critical damage.

Take both when assembling the recommended support package. They address different parts of critical damage output: one helps with critical rate, while the other improves critical damage.

Keep these benefits distinct when comparing potential selections. A critical rate increase and a critical damage increase serve different functions, even though both contribute to the same offensive goal.

Build around Balmy Surf’s Aqua connection

Balmy Surf provides defense penetration based on the Aqua Trekkers in your squad. That gives it a direct connection to team composition.

Use it when building the Aqua squad described below. Its teammate condition is a reason to pay attention to element choices instead of treating every support slot as interchangeable.

Add Tendencies for squad attack

Tendencies brings a 42% squad attack increase to the recommended setup. Include it alongside the other support potentials to keep Willow’s build focused on team damage.

The central Stella Sora Willow build choice is straightforward: select Build Two, then pursue Prismatic Bubbles, Receding Echoes, Balmy Surf, and Tendencies. Keep that package in mind when reviewing your final Record rather than judging the build only by Willow’s individual damage contribution.

Aqua Teams and Runic Disc Choices

Chitose is the recommended main Trekker for this setup, with Suntide Willow in support and Donna occupying the other support slot. This composition puts Willow’s Aqua-focused benefits behind an Aqua damage dealer.

Image: Steam / YOSTAR HONG KONG LIMITED

Team slot	Character	Purpose in this setup
Main Trekker	Chitose	Leads the team’s damage
Support	Suntide Willow	Supplies Aqua buffs, attack increases, and critical support
Additional support	Donna	Adds support and contributes damage

Chitose’s auto-attack build is the example used with this lineup. Her skill build also works, with the choice depending on your emblems.

Match the build to the emblems you have instead of switching to auto attacks solely because that is the example here. Willow’s support package includes benefits that reach beyond one narrow damage type, while individual Disc effects can have more specific conditions.

For a Stella Sora Willow team built around Chitose, review those conditions together: the main Trekker’s build, Willow’s potentials, and your Runic Disc effects should support the same plan.

Exclusive Runic Disc versus Dappled Sunlight

Willow’s exclusive Runic Disc is the recommended offensive option for this Aqua setup. Its effects include a squad Aqua damage bonus, critical damage support, and additional benefits connected to Aqua skills and attacks.

Dappled Sunlight, the event Disc, also offers relevant bonuses through Aqua damage and Trekker attack.

Runic Disc option	Relevant effects	Build connection
Willow’s exclusive Runic Disc	20% squad Aqua damage increase; critical damage bonus reaching 28%; additional Aqua effects	Recommended for the dedicated Aqua support setup
Dappled Sunlight	Aqua damage and Trekker attack benefits	Alternative for a team using Willow

The exclusive Disc’s effects have conditions worth reading. An Aqua support Trekker casting a skill can trigger Tide Wave, while an Aqua Mark interaction increases the target’s Aqua auto-attack damage taken by 20% for four seconds.

That auto-attack effect is especially relevant when considering the Chitose auto-attack setup. Keep its damage type and duration in mind; it is a specific damage window rather than a permanent increase to every attack your squad uses.

Prioritize obtaining Willow herself before extending the investment to her exclusive Disc. The character provides the support kit this team is built around, while the Disc adds another layer of Aqua-focused benefits.

If you already have Dappled Sunlight, compare its Aqua damage and attack effects with the exclusive option before committing more recruitment resources. Keep the decision tied to the team you intend to play.

How to Play Willow in Boss Blitz

Keep Chitose near Willow during combat. Willow follows your active character and remains present on the field during her support activity, so avoid creating unnecessary distance between them.

Boss Blitz also demands movement. Chitose’s damage opportunities compete with boss attacks, movement, and periods when the target runs away. Keep attacking when the opening allows it, then dash out of dangerous ground effects.

Use this combat checklist:

• Stay near Willow. Keep the main Trekker close during her support activity.
• Use Chitose’s dash. The showcased auto-attack setup includes a perk that rewards using it.
• Watch ground indicators. Move out of threatening circles instead of absorbing avoidable hits.
• Use ultimate invulnerability. Time an ultimate to cover a dangerous attack when possible.
• Review the finished Record. Check whether Willow received the support potentials you intended.

Do not evaluate the Stella Sora Willow build solely by her personal damage total. Her recommended setup directs much of its value into the squad, while Chitose handles the main damage role and Donna contributes additional damage.

Keep comparisons consistent. Use the same boss and Chitose build when comparing a Willow setup with another support arrangement. Changes to emblems, potentials, or damage type can otherwise make the result harder to interpret.

Before another attempt, check Prismatic Bubbles, Receding Echoes, Balmy Surf, and Tendencies, then review the Disc conditions attached to your chosen Chitose build.

FAQ

Which character does this Stella Sora Willow guide cover?

This guide covers Suntide Willow, the five-star Aqua support character also known as swimsuit Willow. Her recommended setup focuses on squad buffs, including attack, critical bonuses, and Aqua damage support.

Which potential build should Suntide Willow use?

Choose Build Two for the dedicated support setup. Prioritize Prismatic Bubbles, Receding Echoes, Balmy Surf, and Tendencies. Build One places more emphasis on Willow’s own damage through additional damaging effects.

Who should you pair with Suntide Willow?

Use Chitose as the main Trekker, Suntide Willow as support, and Donna in the additional support slot. Chitose’s auto-attack build is the example for this team, while her skill build is another option depending on your emblems.

Does Suntide Willow need her exclusive Runic Disc?

Her exclusive Disc is the recommended option for its Aqua damage bonus and additional offensive effects. Dappled Sunlight also provides Aqua damage and Trekker attack benefits. Prioritize Willow’s support kit, then choose the Disc investment that fits your Aqua team.