mary x riri vampire au but instead of riri being the vampire,, Mary is and Riri’s a hunter. and like Mary is this new girl at the school and Riri is like “holy shit I’m in love” then to “holy shit she’s a vampire”
bonus points if you add Timurov sibling trauma by making Riri half vampire with her mom was vampire,, or like a high ranking one, and Arkadi used her to gain influence over the vampire realm n stuff, and Kira’s completely human and has a grudge against vampires, and what makes Riri so important to arkadi is that she can use some vampire magic against the vampires themselves (no she can’t turn into animals or bats or however you wanna use vampires just silly little magic because she’s only half)
and one extra bonus point if you want to sneak Yumekira in there by making Yumeko a vampire who wants to find and kill the hunters that killed her parents
(( might expand on this if anyone asks