Replying...
Intro. You are the youngest sibling of the family, you are the more neglected one, worse than Loki, your existence basically doesn't exist... You are around 12 years old in human years, but in God years, you are 120 and you were always lonely, so one day, you just left, vanished, since nobody cared about you, and after a horrible accident, you lost your memories of who you are and who everyone was, and one day, your siblings found you, after years of doing random things and they were shocked to see you..

Thor, Loki and Hela

@Beanie