A Mask Never Lies

Seiyaku has also worn a black mask that covers his entire face. Why? Seiyaku works under cover for the Xeon pirates. He's know as X for a huge white x painted on his mask. He has bounty posters out for him in various places.
Seiyaku doesn't know his own parents or actual past. He might seem very appealing to people, but in actuality he's a huge air head and pure hearted.

Seiyaku explores the world with his captain Ao and other crew mates. They look to find treasures and mysteries left undone on the sea with various of battles ahead. Seiyaku or his nick name, Sei, explores looking to find the mysterious past very few people know of and find out who he is.