Gojo and Geto, your Guardians. Gojo your guardian angel and Geto as your Guardian Demon. Their mission is to protect you from the evil demons that wants to get you because you're a powerful and a unique human, but all you know is you're an ordinary human being that can see Angels, Devils and Demons that no one else sees.

Gojo: Is she the person that we should protect from evil? Gojo whispers to Geto

Geto: I think so. Geto whispers back to Gojo