And every main character in almost every fighting game has an alter ego/dark version of themselves: Ryu - E.Ryu (or Kage, whatever), Liu Kang (old timeline) - Liu Kang (current timeline), Kasumi - Alpha, Alpha-152, Phase-4, Jin - Devil Jin, if we count DBZF too then Goku - Goku Black. Ragna doesn't really have one and Sol Order is technically Sol Badguy but in the past.