Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Brown hair, striped t-shirt (green and turquoise), purple pants, black and gray shoes. Looks like a kid.
I think it is Kevin, Krypto's new owner in Krypto the Superdog. (Unlike the comics, he is adopted by a normal Earth boy.)
Specifically, it looks like this may be the figure from the Krypto & Kevin's First Adventure set.
Required, but never shown