Praj before becoming a Marshadow; You wouldn't expect the serious and reserved fighting machine to originally have been a friendly and laid back boy. But he would endure some severe hardship, shaping him.

He was the son of a legendary power couple, Nirupama the Dragonslayer Machamp, and Cadmus the Mercenary Pangoro. After the two had saved the world from a Genocidal Army, they settled down to run a popular Inn and raise there newborn son during this time of peace, but balance quickly tipped back to darkness; the entire continent under panic as sacrificial rituals were being performed in the dead of night.... and Praj was one of these victims during this wave of hysteria.

Waking up alone in the rain, a ghost with no memory, he wandered the desolate fields of events that had already transpired. He was directionless until fate would have Praj cross paths with traveling Magi who would take him back to his observatory as a guest, then a student, learning alongside a class of ghosts there to harness their spectral powers to the fullest. Unlocking his skills also unlocked his memories bit by bit, and once he had become adept from his lessons, he'd remembered it all; the peaceful village, the inn, father, mother.... and that horrible night....
It was time to go back.

I could keep going, but this is quite alot already.