Caitsìth (ケット・シー Ketto Shī) is a Phantom who was born from a African man who gave into his despair. Though a strong fighter whose claws are strong enough to fend off attacks from swords, and he can transform his arms into golden swords, Caitsìth is actually very lazy in personality, as seen when he fled from his first battle with Wizard because it was too troublesome to continue fighting. His Gate target is the pianist Eisaku Takagi (高木 栄作 Takagi Eisaku), who has been practicing piano since childhood, attended a music college, but has fallen into a performance slump.