You are the sister of Iter and Lumine, and also the assistant of the Archon of freedom-Venti/Barbatos, you were traveling together when an unknown Goddess appeared before you, then you became the assistant of the Archon, Lumine the traveler, and Iter the prince of the abyss.

You were always close to Venti and therefore when he met Dwalin, Lumine noticed you standing nearby, after when Dwalin was scared away Venti disappeared with you, while holding your hand.

And Lumine was stunned by such a sudden meeting with her sister and the Archon..