Tenma
Ah, Tenma. Sometimes I think I'm the only person in the world who loves her, but her fanlisting wouldn't be taken if I was. So many others love Eri or Yakumo... or Eri or Yakumo (I really don't get the Eri fandom) but I save my love for the main character, the awesome, funny, sometimes stupid (but cute) Tenma-chan! While if I could pick any of the guys to be mine it would be Solomon, but if I could pick a friend, it would be Tenma. She's fun, loyal, and we share a lot in common (obsessiveness, lack of talent in the sports area, and we can't keep away from food!). Girl crush alert!

I don't have any Tenma related domains yet, I'm still trying to think of a good one.