Astra Yao

Ether

Support

MercerJun 25, 2025

Astra Yao is an S rank Agent with the Ether attribute who belongs to the Support Specialty and who is part of the Stars of Lyra faction.

W-Engines

Elegant Vanity

Best in Slot in all situations, provides Astra with Energy Regeneration, a stacking 10% DMG Boost for the whole team and a massive 30% ATK Main Stat to help her with reaching her

Core Passive Requirement, but due to the strength of A Rank Support W-Engine's, this W-Engine is somewhat overkill and Astra can reach full potential without it.

Bashful Demon

The best peforming A Rank W-Engine for Astra, providing a generous 3.2% Combat ATK% boost that stacks up to 4 times at S5 while having a ATK% Main Stat to help out with Astra's

Core Passive requirement making it all around the best.

Kaboom the Cannon

The 2nd best A Rank W-Engine for Astra, almost has the exact same passive bonuses as Bashful Demon but requires way more careful play to maximise it, requiring constant Quick Assists to keep its effect up, it also doesn't have access to a ATK% Main Stat making it harder to fulfill Astra's

Core Passive requirement but still a servicable option if you don't have Bashful Demon.

Drive Discs

4-Piece Sets

Astral Voice

Astral Voice was simply made for Astra, she has no issue mainting its Quick Assist requirement, making her have full uptime on its 24% DMG Boost at all times

2-Piece Sets

Swing Jazz

Her best 2-Pc set, gives a very needed 20% Energy Regen bonus helping her Quick Assist more often

Hormone Punk

A potential option for people running Kaboom the Cannon that need more

ATK% to reach Astra's

Core Passive requirement

Stats

Drive Disc Main Stats

Slot 4

ATK%

Slot 5

ATK%

Slot 6

Energy Regen% /

ATK%

Sub Stats

- For Crit based usage:

ATK%/

Flat ATK until Passive Cap >

Crit Rate =

Crit DMG >

PEN
- For Anomaly based usage:

ATK%/

Flat ATK until Passive Cap >

Anomaly Proficiency >

PEN

Baseline Stats

ATK: 3429+ (34925 is the

ATK cap for her Core Passive)

Energy Regen: 0%+ - 130%+ (Depends on W-Engine and Disk Main Stat choices)

Core Passive cap and Energy Regen

Astra Yao needs at least 3429 BASE ATK to fulfill her

Core Passive requirement, this should be your highest priority. After getting 3429

ATK you should focus on getting as much

Energy Regen as possible with Min/Maxing stats, the more

ER% you have, the more Quick Assists you can trigger which will make your rotations easier with Astra on the team.

Skills

Special Attack: "Windchimes & Oaths" & Idyllic Cadenza

Press to activate:

Quickly move away, then release Tremolo, dealing

Ether DMG, and enter the Idyllic Cadenza state. Hold

to charge during activation, drawing enemies in, and follow up with 1 to 4 Tremolos depending on the charge duration. A Quick Assist will be triggered when this skill hits an enemy.

Astra's bread and butter Ability, 99.9% of the time you will use this skill once at the start of the fight and simply reap the benefits it provides for the rest of the fight for free.

Ultimate: "Fantasian Sonata"

When Decibel Rating is at Maximum, press to activate:

Use song to channel energy into a blast, dealing massive

Ether DMG, and restoring HP to all squad members.
After the skill, Astra Yao enters the Idyllic Cadenza state and the next two Quick Assists will be replaced by

Chain Attacks.

Astra's only other Ability you'll be using, mainly used during Burst Phases to give yourself more

Chain Attack damage and healing.

Mindscapes

Mindscape 1

Provides a stacking All-Attribute RES shred up to 18% and a free 1000 Decibel boost while entering the field for the first time.

Mindscape 2

Increases the buff gained from her Core Passive by 400 ATK, making the complete buff 1600 ATK and providing some extra damage whenever anyone Quick Assists.