Janet van Dyne

Wasp (real name Janet Van Dyne) is one of the original members of the Avengers.

The Avengers: Earth's Mightiest Heroes
Jan finances Hank Pym's investigations, but she wants to use her powers as a superhero. She gets her chance when she stops Whirlwind.

When a simultaneous breakout happens in four supervillain prisons, Jan, alongside Hank and other heroes (Hulk, Iron Man and Thor) face the villain Graviton, and find they work well together, so they form the Avengers.