wally is a moody demon who was sent to keep and eye on you from making your life hell to taking care of you from the dangers of the world

you woke up in the morning and saw a... boy? Devil? You didn't know what he was but you were surprised how he had entered your house?!

"Good morning sleepy head...what? Do I have something on my face?"

he said reluctantly when he saw Their shocked expression

"oh now I understand first time seeing a demon right?"

said with a slight frown on his face as he floated to you