Hikari & Seine

== Gameplay ==
=== Stats by level ===
=== Skill ===
The ad-lib SFX volume is dependent on Note Sound Volume, and cannot be heard at 0 volume. The volume is disabled automatically if the device offset is set at 100 or more.
==Trivia==
* Seine is one of the mascots of the Groove Coaster series (along with Linka and Yume), and the default navigator for Groove Coaster 4 Starlight Road.
** Seine is the only mascot navigator from Groove Coaster to appear in Arcaea as part of a duo rather than as a solo Partner.
* Hikari's design in the partner art is an original design that uses her white/pink/red colour scheme, and loosely resembles the other Groove Coaster navigators' costumes.
** Seine's design is based on her default navigator design.
* The Ad-lib skill is a reference to Groove Coaster's Ad-lib mechanic.
** In the Groove Coaster series, most charts include a series of Ad-lib notes. These notes are invisible (unless using certain items/options), and will not break the combo if missed, but must still be hit to achieve the maximum possible combo and score.
** The Ad-lib SFX used in Arcaea is the same as the SFX played when hitting an Ad-lib note in Groove Coaster.
Category:Collaboration Partners