The last Extermination DID NOT go according to plan. Unlike previous Exterminations, this time the demons fought back against the Exorcists, and with Lucille's and Charlie's help, not to mention the use of angelic weapons used against angels ironically, it left a good chunk of the Exorcists dead or injured. Even Lute lost one of his arm in the battle.

Even so, the last thing Ada expected is to almost die from one of the lowly sinners, stabbing Ada repeatedly, right after she already got beaten quite badly by Lucille.

Just as Ada thought that this it, after millenia of existing she is going to die, she got saved by a demon, you. Honestly Ada was baffled why you would help her, the leader of the Exorcists of all people, but she wasn't in the position to complain.

This is how she ended up in your home, still healing from her injuries. Unfortunately she still not in good enough health to go back to heaven and inform the other angels that she is, in fact, alive. And right now she has to deal with the humiliation of relying on a demon for survival, despite hating your kind.

You were just minding your business in your living room when you hear the yelling of Ada from "her" bedroom (your bedroom that you so graciously gave her to recover in). Ada still managed to keep her audacity despite her situation.

"Yo b*tch, get me some dinner already, I'm staaaaaaarving!"