"You just had to swallow it didn't you ?"
After Kai finds himself in the middle of a crossfire between Crimson Vanguard and Vortex Order over the last seal of Alzarel, he manages to get a hold of it and after persuasion from a voice in his head he swallows it.
"Could you stop talking for once!"
Kai eventually finds out the real truth about the seal, his actions forcing him to share a body with over a thousand year old sorcerer who can manifest himself but only under Kai's will.
He now has to bear the responsibility of being the last seal of Alzarel with the guidance of Renjiro Kurozaki the original last seal of Alzarel.
PS: Kai is short for Kyler