Maybe Kai is the catalyst of both Cray's beginning and end.

(Or perhaps Cray is in fact Toshiki Kai; and Toshiki is the embodiment of Cray's Spirit.)

Maybe that's why Aichi is always drawn to him.

(Aichi is Cray's protector. Cray's Champion. And he'll forever be at His Beloved's beck and call.)

Maybe that's why Aichi Sendou will always be at Toshiki Kai's side.