Talk:Toaru Kagaku no Railgun (manga)/@comment-68.174.11.63-20131106215034/@comment-24001115-20131106230803

Do you mean Kamijou Touma? If yes, then it's because he is the main protagonist in Index and he has appeared in Index before railgun. Additionally i think he is just a side character in Railgun. I have to add that he isn't really Misaka's boyfriend. Although it's stated in the LN that Misaka has feelings for him, they aren't in a relationship.