Thread:Whovianfan/@comment-5616350-20160804020106/@comment-6945486-20160805184715

I'm going to guess Kirei Kotomine will adopt Crona as his child. He wants to kill Crona, some conscious of good in him wants to save people then something else in his mind says in his moral compass holding between good and evil, evil going out he could use Crona to destroy people easier.

Kirei Kotomine stops from killing Crona when he is reminded by Clockwork he would serve a higher purpose with him. Clockwork who sees some good in Kirei Kotomine somewhere in the future. He received visions in some alternate future that is the Fate/Stay Night Heaven's feel route where Kirei Kotomine helps the heroes fight Zouken Matou.

http://legendsofthemultiuniverse.wikia.com/wiki/Clockwork_(Danny_Phantom)