Which Fighter Fills You With Dread Playing?

I would expect most peoples answers will be lightweights, but I realized there are just some fighters who I am absolutely terrified and on edge a lot when playing, namely Isabelle and Pichu, and was curious about others experiences with this because it’s not like I’m horrible with Isabelle and Pichu has my favourite and nicest feeling combos, like for example, although I play Isabelle like an online Isabelle, her gameplay came very naturally to me to the point I reached a higher gsp playing her for 2 weeks than I ever did with Ike, and yet still any confrontation as them leaves me so on edge.