I wanted to be sure that she wouldn't be around to interfere with my future plans in this competition. It had nothing to do with her winning or not winning; you all sealed her fate from the word "go" in that regard.

[Hence why he wanted to bail on her team in the first place.]

Ruin was my only target, but I had to kill others to get to her. Hector was collateral damage, Ai was a favor. Ai for an Ai, hah.

[don't laugh at that it's a bad joke.]