Atomic Rabbit is a superhero bunny who had his own comic between 1955 and 1960 (though the last few issues were under the name Atomic Bunny for some reason). You can read some of them here: http://comicreadinglibrary.blogspot.co.uk/search/label/Atomic%20Rabbit

I'm pretty happy with how this turned out. My first drawing was a pencil and ink full body pose and yeah, that one wasn't so good.