He is the leader of the Desert Apostles, who wishes to kill the Tree of Hearts. He is usually seen sitting on a chair on a high level in the Desert Apostles' base, always having his right-hand Dark Pretty Cure by his side. He is never seen without his mask. His personality has not been shown properly, however, he wishes to finish off the newest generation of Pretty Cure in order to take down the Tree of Hearts.

Spoiler

It is revealed near the end of the series, that Sabaaku is actually Yuri's missing father. He then says that Dark Precure is actually Yuri's younger sister, and then he dies, protecting Yuri, which leaves her heartbroken.