Ico

A character who only shows up for a match that isn't canon.

Acursed Child
Bearing a curse that gave him horns, Ico 's village blames him as an evil creature of misfortune, eventually knights send him to a castle to be imprisoned in a stone coffin and die of Immurement. An earthquake breaks his stone prison and allows him to escape, but while seeking his way out, he finds a girl trapped in a cage named Yorda who is the Queen of the castle's daughter. Eventually Ico discovers that the Queen wants to use her body as a mean to gain eternal life, and using all of his might stops her, but not without a great sacrifice; as the castle crumbles, Ico lays on the floor with both horns broken and losing blood, until he falls into a dream. His fate and Yorda's unknown.

Season 3
As a boy, Ico was a great fan of wrestling before his curse, it is believed his appearances during S3 was the last dream he dreamed, him fighting with his favorite stars, before passing away.

Trivia

 * Only character so far to only appear in non-canon matches