Honkai Star Rail Robin Build Guide

Robin is a 5-star Physical character who follows the Path of Harmony. Born in Penacony, she ascended to Cosmic fame as a Halovian singer. Known for her elegance and demure demeanor, she has returned home at the invitation of The Family to enchant everyone with her melodies at the Charmony Festival. Using the power of Harmony, she broadcasts her music, creating "resonance" that captivates not only her fans but all manners of lifeforms.

Abilities

Effect

Basic Attack

Wingflip White Noise

Robin strikes a single enemy, dealing Physical damage equal to 50% of her attack.

Skill

Pinion's Aria

Robin boosts all allies' damage by 25% for three turns. Each turn, the duration decreases by one.

Ultimate

Vox Harmonique, Opus Cosmique

Robin enters Concerto state, allowing allies to act immediately. She boosts all allies' attacks by 15.2% of her attack plus 50. Additionally, after each ally attack, Robin deals extra Physical damage equal to 72% of her attack, with 100% Crit Rate and 150% Crit Damage. While in Concerto state, she's immune to Crowd Control, and cannot act until it ends. A countdown tracks the state's duration.

Talent

Tonal Resonance

Increases all allies' Crit Damage by 5%. After the allies’ attack, Robin gains two additional Energy.

Technique

Overture of Inebriation

Robin creates a dimension lasting 15 seconds. Enemies within it focus on her. At the start of each wave, she gains five Energy if the dimension is active. Only one such dimension can exist at a time.

Trace

Coloratura Cadenza

Robin's action is advanced by 25% when the battle begins.

Trace

Impromptu Flourish

While in Concerto state, allies' Crit Damage from follow-up attacks increases by 25%.

Trace

Sequential Passage

Using her Skill grants Robin an additional five Energy.

Eidolons

Effect

E1

Land of Smiles

While Robin is in the Concerto state, allies gain 24% All-Type Resistance Penetration when they attack.

Afternoon Tea for Two

During Concerto state, all allies' Speed increases by 16%. Robin's Energy Regeneration effect from her Talent also increases by one.

Inverted Tuning

Increases the Skill and Ultimate levels of Robin by two, maxing at level 15.

Raindrop Key

When Robin uses her Ultimate, she removes Crowd Control debuffs from all allies. While in the Concerto state, she boosts allies' Effect Resistance by 50%.

Lonestar's Lament

Boosts the level of Robin's Talent by two, maxing at level 15. Additionally, increases her Basic Attack level by one, maxing at level 10.

Moonless Midnight

While in Concerto state, the Crit Damage of Robin's additional Physical Damage from her Ultimate increases by 450%. This effect can trigger up to eight times, resetting with each use of her Ultimate.

Flowing Nightglow

★★★★★

Optimal 5-Star Choice

The best light cone for Robin is the 5-star Flowing Nightglow. It works really well with her abilities, making it her best option. It helps her generate energy faster and makes her and her team deal more damage. It also boosts Robin's own attack power. So, using this light cone gives Robin the biggest boost in attack power, especially because it has a high attack stat. But unlike some other characters who really need a specific relic to play well, Robin doesn't rely too much on Flowing Nightglow. So, if players want to save their resources but still play Robin well, they don't have to get this relic.

But the Battle Isn't Over

★★★★★

Alternative 5-Star Option

But the Battle Isn't Over is another great 5-star relic choice for Robin. It helps her use her Ultimate ability every 3 turns, even without needing specific gear like Sprightly Vonwacq. It also helps her team recover skill points. For every two times Robin uses her Ultimate, the team gets some skill points back. If the main attacker on the team goes after Robin in battle, she can boost their damage too, along with buffing their skills. But this boost isn't as big or frequent because Robin doesn't do anything while her Ultimate is active.

For Tomorrow's Journey

★★★★

Alternative 4-Star Option

For Tomorrow's Journey is a great choice for players who got it from a recent event in the version 2.2 update. It's the best 4-star light cone that players can get without spending money. It boosts the team's attack power a lot, making them deal more damage. It also makes Robin do more damage during her Ultimate move. But players need to make sure Robin can still generate energy for her abilities because this light cone doesn't give her any energy.

Past Self in Mirror

★★★★

Alternative 4-Star Option

While Past Self in Mirror is mainly meant for Ruan Mei, it still has some good points for Robin. However, it doesn't make her as strong as she could be because it focuses on Break Effect. But it can still help boost damage for the team after Robin uses her Ultimate move. Also, it helps Robin generate energy, which is handy for long battles like Pure Fiction. But to get the most out of its skill point recovery feature, players need to make sure Robin has some Break Effect stats, which might make it harder to decide how to build her.

Musketeer of Wild Wheat/Prisoner in Deep Confinement/Champion of Streetwise Boxing

When picking the best Relic set for Robin, focus on increasing her attack power and, to a lesser degree, her speed. Combining the Musketeer and Prisoner sets from the Honkai: Star Rail set is a good choice since they both boost attack. Another option is to use the full Musketeer of Wild Wheat set, which adds speed and improves her basic attack.
If your Robin already has a speed stat of at least 121 without relying on speed as a main Relic stat, go for the combo with the Prisoner set instead of the full Musketeer set.
You can also consider using a two-piece Champion of Streetwise Boxing set alongside Musketeer or Prisoner to increase Robin’s damage during her Ultimate move. However, since her team buffs are based on attack, it's usually better to focus on that. The four-piece Champion set takes longer to get its attack bonus, so it's better suited for longer battles.

Sprightly Vonwacq/Penacony, Land of the Dreams/Space Sealing Station

For Planar Ornament sets, Sprightly Vonwacq is great because it improves Robin’s energy regeneration and ensures she acts first in battle, benefiting the team immediately. Penacony, Land of the Dreams offers extra energy regeneration and a damage bonus for allies, but it's only useful if some of Robin’s teammates are physical characters.
If you don't need extra energy, consider using an attack-boosting Planar Ornament set like Space Sealing Station, which offers a 24% attack increase, like the Musketeer and Prisoner Relics.