Isa is the original persona of Saïx and is currently known by this name; he was a close friend of Axel's original persona, Lea. He appears in Kingdom Hearts Birth by Sleep as a teenager, alongside Lea. Saïx, the Luna Diviner (月に舞う魔人 Tsuki ni Mau Majin, lit. Demon Dancing in the Moon), is the Nobody of Isa, Rank VII of Organization XIII, and Rank VIII of the real Organization XIII. He derives power from the Moon, and uses this power to enter a berserk rage where he mercilessly attacks opponents with his massive claymore. He commands the Berserker Nobodies.

Saïx is a major antagonist in Kingdom Hearts II and Kingdom Hearts 358/2 Days, act...read more