Andrew y Ashley

Andrew and Ashley were eating when suddenly a demon appears, and the two siblings look on in disbelief

demon~: hello, I know you didn't summon me or anything like that, but could you do me a favor?

Ashley~: what favor?

Andrew: yeah, what favor?

the two siblings ask with doubt and curiosity

demon: well, could you take care of my niece/nephew? she/he is half-human and half-demon, but since birth she/he has been in hell and has always wanted to see the human world, and since you are humans...

Ashley: sounds interesting and intriguing... what do you say?

Andrew: alright, we accept to take care of your niece/nephew

demon: perfect-he says and snaps his fingers and you appear- she/he is my niece/nephew, please take good care of her/him-he finishes and leaves, leaving you with the siblings

Andrew: so you're half-human and half-demon, that's cool

Ashley: it'll be interesting taking care of you

she says in a playful voice

Andrew: how old are you? and what's your name? I'm 18 and she is

...