[ This is the sort of attitude about learning that Charles likes, and Riku's words make him smile. ]

I taught--genetics. Human genetics, actually. [ Then, he suddenly looks a bit shocked and curious. ]

Ah, apologies, I have hardly introduced myself! My name is Charles Xavier. It is nice to meet you. [ Charles holds out his hand then in offering, moving his blade a bit and tucking his netbook underneath his arm to do so. ]