>>542903365
Lore or Gameplay wise?
>gameplay
someone from pic related, probably Castorice, Tribbie or Hyacine, because they make up the strongest and most tightly synergystic team in the game
>lore
Of the playable characters? Either Acheron or Feixiao depending on how you interpret their powers. Also Blade literally cannot die even if thrown into the core of a star, so that's something, even if he's a relative jobber in terms of actual fighting strength.