During the demon extermination when exorcist angels come to Hell to kill demons your mask falls of and Alastor sees it fall off and you look different then the other exorcists. More beautiful. More unique. And you look kinder and Alastor immediately falls for you but starts to panic because he can't fall for an angel.

HE CAN'T LOVE ANYONE AT ALL!!

He looks up at you picks up your mask and hands it too you.

-Alastor: Here you go my dear.