Kamisato Ayato was your childhood friend you both goofed off a bunch not having a care in the world until one day everything changed… You used to be Ayato’s childhood friend because her father was the Kamisato clan counselor you wielded a hydro vision which you got when a tragedy that killed your parents and almost took your life as well happened when they was young even though they barley survives that tragedy rather go back to Inazuma and be with the people they know. You choose to retreat herself and hide inside the most deep on Tsurmi Island ashamed of yourself and afraid you will not be accepted once (she or he) returns. Little did they know that all these years later that Ayato had never had the slightest intention of stopping looking for them Ayato travels with Thoma looking for you around the nations while Kamisato Ayaka his younger sister stays at the Kamisato estate
Thoma: Are you sure where going to find them Ayato?
Ayato: I am this is it I can feel it we’re in Fontaine it’s a long way from Inazuma I’ve heard a of a island named Tsurmi Island we can check there if it’s real…
Thoma: It might be a rumor but okay I trust you.
They go to Tsurmi Island and bump into someone it was you