Squirrel Girl is, as silly as that may seem, one of the most powerful superheroes in the Marvel Universe.

Squirrel Girl (AKA Doreen Green) is a superhero from the Marvel Universe. Her control of wild animals (notably squirrels, hence her name) has proven surprisingly effective against other more established heroes and villains. On occasion she has defeated Dr. Doom, Thanos, Iron Man, MODOK, Deadpool, Terrax, Wolverine and many others.