Canon x OC pairings where the thread maker wants OC slot makes it look like the following:

OP wants to make a creative character and slot the other person in a position of rigorously sticking with the canon of the given verse so OP can fulfill a fetish to be a part of the universe (fandom, basically) without inviting much creative modifications from the other side. Hence, a non-original roleplay, and something probably better suited to just being a [s]poor grammar, no paragraph[/s] fanfiction for the interest it will probably bring. Bonus for it being an anime [s]totally not ecchi[/s] set of pairings.