Probably her name and he is hella smart as it was mentioned in the earlier chapters so he probably pieced it together
It makes sense, they’re both geniuses after all
╮(￣▽￣)╭
also it could be by her presence, because he perceives her to be cold and sharp like a sword. and the vibes she gave off in her disguise was most likely the same so he caught her right away
Ohh thats possible,I didn’t think about that (づ￣ ³￣)づ
How did he recognize her?????