In case anyone's wondering who the evil einstein might be, this is entirely my guess and I have no idea if it's actually the person. But Albert Einsteins son, Eduard Einstein was a genius psychiatrist, but also extremely sick. According to stories, he was schizophrenic and was treated with electroconvulsive treatment, which only made him more insane.
Eduard Einsteins the only evil Einstein i can think of, and if it is him, it would explain the "shut-in" and sort of crazy vibe the character gives off.