C1: Factor Confluence

The Soulwind state of Starfrost Swirl can decrease the healing interval between instances caused by Skyfeather Song's Eagleplume state. This decrease percentage is equal to the ATK SPD increase provided by Soulwind.

C2: Companion's Ingress

When Starfrost Swirl's Flowfrost Arrow first hits an opponent, or its Rimestar Flare hits an opponent, 1 Detector stack from Passive Talent "Suppressive Barrage" will be generated.
You must have unlocked the Passive Talent "Suppressive Barrage" first.

C3: Reconnaissance Experience

Increases the Level of Skyfeather Song by 3.

C4: Sunfrost Encomium

When Mika's own Skyfeather Song's Eagleplume state heals party members, this will restore 3 Energy to Mika. This form of Energy restoration can occur 5 times during the Eagleplume state created by 1 use of Skyfeather Song.

C5: Signal Arrow

Increases the Level of Starfrost Swirl by 3.

C6: Companion's Counsel

The maximum number of Detector stacks that Starfrost Swirl's Soulwind can gain is increased by 1. You need to have unlocked the Passive Talent "Suppressive Barrage" first.
Additionally, active characters affected by Soulwind will deal 60% more Physical CRIT DMG.