Grand Kai is the boss of the Four Kais and a supportive technique master, having no physical strength. Grand Kai is an aged hipster, frequently listening to rock and rap music. He actually blurted out the lyric to "Rock n Roll All Nite" by KISS while talking to Arashi and Mason. His main outfit is a denim jean jacket and jeans with black Wayfarer glasses. He is sometimes seen with a snapback hat, saying he's trying to tap into his "swagg".