Because she's the one human he can't manipulate, so he's obsessed! QueenChan
It's craving just how genuinely smitten he is with her about it too LMAO He's always so interested in how she actually sees him and her honest opinion. I wish he knew how to "human" better so that he didn't have to do all that crazy shit just to get her attention.
Yohan just be using everyone else's memories to gaslight the fuck out of her