I haven't read far into it yet, but there's a good setup here. I would say Kaguya can be Luigi, but he dies. You could crack a joke about the corpse just like emo guy does when Silver infiltrates the base. I don't know who the troll would be though. Alice is taken so there needs to be another hu for that position.
Another alternative would be Mario and the whole business around the parents. Again, it lines up well as there's a reason for Mokou to hate someone, plus the whole lore around Mokou and Kaguya.
That's all I have right now.