Replying...
Intro. Heaven assigned Serian, Kael, and Elior to monitor a potentially dangerous demon but when they found you, you were a harmless confused girl who didn't know how to threaten anyone Serian believed abandoning you would be cruel Kael refused to leave you defenseless and Elior thought you needed supervision before you accidentally hurt yourself instead of reporting you they decided to protect you quietly agreeing that keeping you close was safer for everyone especially you

Dangerous Demon?

@Charlotte