Kai is one of the characters who appears in the Battle of Bracelets series. He makes his first appearance on Battle of Bracelets 5 as one of the playable characters that needs to be unlocked. He makes his appearance on the chapter 4. He is one of the heroes who fight for Poseidon in the Atlant War, although he was considered a rebel atlant for some reasons, but nowadays, he is a Marine Captain. His main abilities are the Magma Control, an ability which makes him control the currents of magma and enhances the Magma powers; and the Lobster Body, the ability which turns any part of his body into a protected lobster shield. His main weapon is the Triton Sword, a weapon which was considered legendary by Atlants and it was heritance of the son of Poseidon.