Emma C. Squared is one of Hyperman's sidekicks in The Adventures of Hyperman.
The Adventures of Hyperman was a very short lived series on CBS from 1996 that only aired for 13 episodes. It was based on the educational PC adventure game of the same name. Most of the show is lost media with only a couple of episodes surviving in very poor VHS quality.
Shirt is either pink or purple, hard to tell with the image quality.