The Super Idol from the Zenless Zone Zero universe, Astra Yao makes her debut in the Honkai Star Rail x Zenless Zone Zero Collaboration event in version 3.8. In this guide, we will go over how players can best build Astra Yao to make her one of the best Support characters in Honkai Star Rail.
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Astra Yao Skill Kit & Playstyle Analysis
General Introduction
Astra Yao is a 5-star character of the Quantum Element and Harmony Path. She specializes in granting the team powerful buffs that boost the team’s Basic Attack damage and make all enemies take more damage when her special zone is in effect.
Skill Analysis & Leveling Priority
| Basic Attack: Pirouette Pianissimo Deals Quantum DMG equal to 100% of Astra Yao’s ATK to one designated enemy. Enhanced Basic Attack 1: Cadenza Cascade Deals Quantum DMG equal to 160% of Astra Yao’s ATK to all enemies. Enhanced Basic Attack 2: Minuet Pianissimo Deals Quantum DMG equal to 180% of Astra Yao’s ATK to a designated target, and Quantum DMG equal to 90% of Astra Yao’s ATK to adjacent targets. | |
| Leveling Priority: Highest | |
| Reason: Astra Yao’s main damage ability, level this up to optimize her damage output. |
| Skill: Increases the ATK of all ally targets by an amount equal to 24% of Astra Yao’s ATK plus 300, and enhances Astra Yao’s Basic ATK, lasting for 3 turn(s). At the start of this unit’s turn, this duration decreases by 1. | |
| Leveling Priority: High | |
| Reason: Astra Yao’s skill that boost the entire team’s attack stat. Level this up to allow her to grant the team the most amount of attack increase buff. |
| Ultimate: Deals Quantum DMG equal to 320% of Astra Yao’s ATK to all enemies and deploys a Zone that lasts for 4 turn(s). At the start of this unit’s turn, the Zone’s duration decreases by 1. While the Zone is active, DMG taken by all enemies increases by 32%. After an ally character uses a Basic ATK to attack enemies, Astra Yao deals 1 instance of Quantum Additional DMG equal to 40% of her ATK to the target hit by this Basic ATK. | |
| Leveling Priority: High | |
| Reason: Astra Yao’s ultimate allows her to boost the damage taken by all enemies by a massive amount and allow her to deal additional damage to enemies. Should be leveled up to optimize the damage taken increase debuff values. |
| Talent: When an ally target attacks an enemy, Astra Yao gains 1 “Syncopation.” Each “Syncopation” increases DMG dealt by all ally characters’ Basic ATK by 5%, lasting for 3 turn(s). Astra Yao can gain a maximum of 10 “Syncopation.” Zoned In on Zero When Ellen is in the team: After Astra Yao uses her Ultimate, she automatically uses “Cadenza Cascade” once, then immediately triggers Ellen’s “Saw Teeth Trimming,” causing Ellen to gain 1 point of “Shark’s Gotta Bite,” and “Ice Sea Diving.” After Ellen uses her Ultimate, she automatically uses “Ice Sea Diving” once, then immediately triggers Astra Yao’s “Minuet Pianissimo” and grants Astra Yao 1 extra turn. While “Zoned In on Zero” is active, when Ellen and Astra Yao’s attacks select a primary target, they both prioritize selecting enemy targets in the “Bite Mark” state. Basic ATKs triggered by “Zoned In on Zero” do not recover Skill Points.After Ellen or Astra Yao uses their Ultimate, they dispel Crowd Control debuffs from the other. When Ellen is not in the team: After Astra Yao uses her Ultimate, she additionally regenerates 40 Energy. | |
| Unlock Priority: Highest | |
| Reason: Astra Yao’s Talent that allows her to boost the entire team’s Basic Attack damage output and gains synergy with Ellen Joe. |
| Bonus Ability 1: Increases CRIT Rate by 50%. When Astra Yao’s ATK exceeds 2000, for every 200 ATK above that, increases this unit’s CRIT DMG by 20%, up to a max increase of 200%. | |
| Unlock Priority: High | |
| Reason: A Bonus Ability that helps to optimize Astra Yao’s critical stats, reducing her needs for critical stat from other sources. |
| Bonus Ability 2: When using “Cadenza Cascade,” additionally regenerates 10 Energy. | |
| Unlock Priority: High | |
| Reason: Astra Yao’s energy regen effect that allows her to gain more energy from basic attacks and help her to use her Ultimate more frequently. |
| Bonus Ability 3: When an ally character uses Basic ATK, Astra Yao additionally gains 1 “Syncopation.” While possessing “Syncopation,” DMG dealt by all allies increases by 40%. | |
| Unlock Priority: Highest | |
| Reason: Astra Yao’s amazing bonus ability that allows her to grant all allies an additional massive boost in damage dealt. |
Playstyle Guide & Rotation
Astra Yao’s skill kit and abilities primarily allows her to massively boost the damage output of the team against enemies when her special zone is up, especially when other characters uses their Basic Attacks.
Astra Yao’s main support effects come from her Skill and Ultimate, each helping to boost the team’s damage output against enemies. When using her Skill, Astra Yao will enhance the team’s attack stat for 3 turns and allow herself to use her enhanced Basic Attack, dealing AoE damage to enemies. Upon using her Ultimate, Astra Yao will deploy a special zone effect. Throughout the duration of the zone, enemies will take more damage when attacked by the team. Additionally, whenever an ally uses their basic attack against enemies when the zone is up, Astra Yao will deal additional damage to them. Upon any ally attacking enemies, Astra Yao will gain a stack of Syncopation that lasts for 3 turns, with each stack providing the team with a 5% Basic Attack increase, up to 10 stacks and 50% increase. When Astra Yao has Syncopation, she will additionally grant a massive 40% damage increase buff to the entire team.
When Ellen Joe is in the same team as Astra Yao, whenever Ellen Joe or Astra Yao uses their Ultimates, they additionally cause the other character to use their abilities 1 additional time and grants special effects to each other.
Astra Yao Best In Slot And F2P Lightcones
Astra Yao Best Lightcone Choices
 |  |  |
| Shine Bright Like Her | Dance! Dance! Dance! | Dreamville Adventure |
| Limited 5* Lightcone | 4* Lightcone | 4* Lightcone |
| Attack: 582 |
| Defense: 529 | |
| HP: 953 | |
| Shine Bright Like Her | Lightcone Rating: Best In Slot |
| Effect: Increases the wearer’s ATK by 24% and Energy Regeneration Rate by 12%. After the wearer uses their Ultimate, if the wearer is not the first character in the team lineup, advances the action of the first character in the team lineup by 25%. If the Ultimate consumes 240 Energy or more, the wearer gains “Our Melody,” increasing the CRIT DMG of all allies by 48%, lasting for 4 turn(s). | |
| Explanation: Astra Yao’s signature Lightcone that boost her attack and energy regen stat while also allowing her to action advance the 1st slot ally whenever she uses her ultimate while also providing the entire team with a critical damage buff. | |
| Attack: 423 |
| Defense: 397 | |
| HP: 953 | |
| Dance! Dance! Dance! | Lightcone Rating: Best Alternative |
| Effect: When the wearer uses their Ultimate, all allies’ actions are Advanced Forward by 16%. | |
| Explanation: The best alternative Lightcone for Astra Yao that allows her to action advance the entire team whenever she uses her ultimate. | |
| Attack: 423 |
| Defense: 397 | |
| HP: 953 | |
| Dreamville Adventure | Lightcone Rating: Good Alternative |
| Effect: After the wearer uses a certain type of ability such as Basic ATK, Skill, or Ultimate, all allies gain Childishness, which increases allies’ DMG for the same type of ability as used by the wearer by 12%. Childishness only takes effect for the most recent type of ability the wearer used and cannot be stacked. | |
| Explanation: A Good Alternative Lightcone for Astra Yao that allows her to boost the basic attack or ultimate damage output of the team whenever she uses her basic attack or ultimate. | |
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Astra Yao Best Relics, Ornament Set and Stats
Astra Yao Best Relics And Ornament Sets
For Astra Yao, her best Relic set is the Musketeer of Wild Wheat
Set, which boosts her attack, speed and basic attack damage output.
 | Musketeer of Wild Wheat |
| 2-pc: Increases ATK by 12%. | |
| 4-pc: The wearer’s SPD increases by 6% and DMG dealt by Basic ATK increases by 10%. | |
| Explanation: Astra Yao’s best relic set that grants her a boost in attack, speed and basic attack, allowing her to act faster and do more damage. | |
For Ornaments, Astra Yao should use the Lushaka, the Sunken Seas set:
 | Lushaka, the Sunken Seas |
| 2-pc: Increases the wearer’s Energy Regeneration Rate by 5%. If the wearer is not the first character in the team lineup, then increases the ATK of the first character in the team lineup by 12%. | |
| Explanation: This Ornament set additionally boost Astra Yao’s energy regen and allow her to grant the 1st slot ally additional attack buff. | |
Astra Yao Best Main Stats & Sub Stats
As a powerful Basic Attack Support Character who wants to use her ultimate and basic attacks as frequently as possible, Astra Yao wants Speed and Energy Regen stats above all.
| Piece | Main Stats |
| Body | Critical Rate% or Critical Damage% |
| Feet | Speed |
| Orb | HP% or Def% or Quantum Damage% |
| Rope | Energy Regen% |
| Priority | Sub Stats |
| 1st | Speed |
| 2nd | Attack% |
| 3rd | Critical Damage% |
| 4th | Critical Rate% |
Important Stat Threshold:
– As Astra Yao is mainly a Support character, players want to focus on boosting her overall speed, energy regen and her survivability with defense and Hp stats above all.
– If players want Astra Yao to deal a decent amount of damage, you can also bring more offensive stats like critical stats and quantum damage% on her instead.
Astra Yao Best Teams
As a powerful Ice Main DPS Character who specializes in dealing Basic Attack Damage, Astra Yao wants to be in a team with characters that can boost her damage output as much as possible while also providing her with additional utilities.
Ellen Joe Hypercarry Team
 |  |  |  |
| Ellen Joe | Robin Summeretto | Astra Yao | Huohuo |
| Main DPS | Sub DPS/Support | Support | Support/Sustain |
This team is the premium Ellen Joe Hypercarry team, with 3 powerful supports massively boosting Ellen Joe’s damage output to the max to allow her to deal as much damage to enemies as possible. Robin Summeretto serves as the team’s support and sub DPS character, capable of amplifying Ellen Joe’s overall damage output and advancing her action while dealing decent damage to enemies. Astra Yao is Ellen Joe’s best support partner, with Ellen Joe gaining additional Enhanced Basic Attack damage instances whenever she or Astra Yao use their Ultimates. Additionally, Astra Yao also provides Ellen Joe with a massive boost in Basic Attack Damage output. Huohuo is the team’s best sustain character, capable of providing Ellen Joe with additional Energy and attack buff while also healing the entire team.
Dan Heng Imbibitor Lunae Hypercarry Team
 |  | | |
| Dan Heng Imbibitor Lunae | Sparkle | Astra Yao | Huohuo |
| Main DPS | Sub DPS/Support | Support | Support/Sustain |
Working in a similar fashion to the Ellen Joe Hypercarry team, the Dan Hend Imbibitor Lunae team takes full advantage of Astrao Yao’s powerful damage boosting effect and basic attack amp buffs to optimize Dan Heng Imbibitor Lunae’s powerful Basic Attack damage output. Sparkle is the team’s primary support that provides Dan Heng Imbibitor Lunae with his much needed Skill Points and additional critical stats, while Astra Yao amplifies the damage he deals to enemies and boosts his Basic Attack Damage output. Huohuo serves as the team’s primary sustain, capable of providing the entire team with energy and attack buff to improve the team’s overall damage rotation and damage output.
Conclusion
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