Board Thread:Questions and Answers/@comment-5762783-20140106220437/@comment-67.189.94.142-20140208193342

Since he was adopted he most likely is a number but we don't know that. We are on only episode 2 and goodness who knows how much longer this OVA Series is going to go for. So really things like this will come to light eventually just like in the original Code Geass Anime.