Board Thread:Questions and Answers/@comment-24979796-20141003111126/@comment-5278765-20141006152909

Same kind of situation as House calling his potential fellows by number (and then offensive nicknames). And just like Mousey stuck while she eventually called the others by name, Thirteen stuck while the others eventually got called by name.

Her forgetting Jo's name repeatedly just bugged me because she didn't forget anyone else's name at any point. It was like she targeted Jo to bully her.