Jack Kyndra

I already finished watching this anime and the fight pacing is too slow and the story is kinda hanging to be honest.. I think the most perfect replacement for Solo Leveling is Mugen Gacha (or Unlimited Gacha in English) and Failure Frame.. If you just finished watching Solo Leveling and you loves it, both Mugen Gacha and Failure Frame anime can continues your desire... Same power system, but with great satisfying revenge story, fast pacing fight scene and good character development..