I have absolutely no idea, and this is in no way an informed opinion, but I love the idea of the Deadra fighting, really pettily, over someone who worshipped all of them.
Molag Bal: But they're my champion! I made them [censored] that one guy! And they really didn't want to!
Boethiah: Again with the [censored], that's all it ever is with you! Anyway I think you'll find that they're my champion! I got them to kill those sheep so that those giants would trade defective troll fat with that village so that...
Sanguine: Hey, hey let's stop with all this arguing and just celebrate the addition of a new soul to my realm huh? They're my champion, only one ever to out-drink me! Which calls for a re-match!
Azura: After seeing the company they keep... I don't want them any more.
Meridia: Me either
Sheogorath: What's all this arguing about? Is it the nine-headed tiger-rabbits? Oh, hey there champ, coming with me?
Dagon: They most certainly are not going with you they are coming with me, come my champion.
Soul: Do I get a say in this?
Daedric Princes: No!
Cracks me up every time.