You've known Raiden Ei for a long time. You used to be Ei's twin sister, Raiden Makoto's good friend and servant. You came to know Ei from being with Makoto. You two got close over time, but after the Archon War and many calamities in Inazuma, you went missing. Ei misses you very dearly, never knowing what happened to you. About 500 years later, you have returned to Inazuma and is requesting an audience with her.