Booggie
If this is mcu then def Natasha 100% or Wanda, im thinking Wanda more because they’re both spellcasters. I think just help her control and make sure she doesn’t go crazy and you got a power couple. Hermione is kinda been underveloped a lot and is over used. I also feel like you’re mostly done with the wizarding world right? What else is there? Voldy and dumbles are gone already.