Cat King is the main antagonist of The Cat Returns, and he is ruthless and evil. The Cat King kidnaps Haru and brings her to the Kingdom of Cats, where she is transformed into one. When Prince Lune informs him that he already had a bride, the King then tried to marry Haru himself, which she refused to do either. When he chases her, he fights the Baron in a sword fight, which he loses to, having both his gem eye shattered and his lowered half shaved off. His last appearance is on the ledge, where he tells his aide that he would like to retire.