The Wasp (aka Janet van Dyne) is a fictional character, a superheroine in the Marvel Comics universe and founding member of The Avengers. Created by Stan Lee and Jack Kirby, the character first appeared in Tales to Astonish #44 (June 1963).
After the character's 2008 death, Henry Pym became Marvel Comics' new Wasp.
Both versions are depicted as having the ability to shrink to a height of perhaps several centimeters, grow to giant size, fly by means of insectoid wings (which appear only at small size), and fire energy blasts.
Janet van Dyne debuted as Henry "Hank" Pym's partner in Tales to Astonish 44 (written by Stan Lee and drawn by Jack Kirby), originally only serving as his partner to avenge the death of her father, scientist Vernon van Dyne. Later in the same issue, she decided to stay with Hank only because she was in love with him, wanting him to realize that he loved her back. They both realized their feelings for each other in Tales to Astonish #56, although it wasn't until later in the series that they acted on them.
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Official Site: Marvel Comics
Links: The Wasp Wikipedia page The Avengers Wikipedia page Avengers Forever