Yamato Kappu

"Oh my gosh! It's Yamato Kappu! We were doing our best to do our best to retake Walkerville and stop Werman from slaughtering us all, but not it gets worse when Yamato Kappu came out from nowhere! He would be speedy enough to destroy my village! I need to stop him before Kappu might kill us all!"

--Su Ji-Hoon, Take Back Walkerville

Yamato Kappu is a World War II-era Japanese cupman soldier that serves for the former Empire of Japan, a former enemy cupman of Cuphead,Mugman, Team Magic School Bus, Su Ji-Hoon, the Preschool Girls and all of his friends, a samurai cup that lives in Inkwell Isle, a loyal samurai to the Emperor of Japan, one of WWII-era cup characters that arrived in Inkwell Isle, a former evil cupman who also serves for King Dice (because of Yamato Kappu's deal with the Devil to make sure that he would protect his loyalty to Hirohito (subsequently both Akihito and Naruhito) by massacring all Cuphead bosses except Werner Werman), and a new cupman soldier serving for Cuphead, Mugman, Lewis Cuper, Ms. Chalice, Team Magic School Bus, Su Ji-Hoon, the Preschool Girls and all of his friends after redeeming himself.

In World War III, he is a samurai cup where he tries to join Cuphead,Mugman and Ms. Chalice if he redeemed himself and take back his self-control soul.He is very loyal to respect Emperors of Japan,use Japanese culture and very polite.