The red kid is Dawn and the blue angel is Micky (yes I like the name :3)
Micky is in a toxic relationship with Dawn. One night Dawn was being very aggressive so Micky stabbed him in self defense.
He came to Alice one night asking her to help him with Dawn. So now Micky stays with her while Dawn doesn't know about it. Dawn is also a psyco Wich is why Micky can't tell Dawn he's with Alice.
Alice treats him like her own child.
And yeah :D