Shinto

Shinto was one of the Students of Paul Gekko

Background
Orphaned at Young Age, Paul Gekko encountered two young orphans. The RX-79-9 Banshee Gundam suggested they would let them in Paul Gekko's Chamber to look after them for a while and teach them ninjutsu. During the time he spent with them, He grew close to the three children after the final battle of Ka Boa Bu.