>>22210444Because Shu said he didn't want to design how his sisters look like when chat asked about their hairstyles, and in his jp zatsu he pointedly ignored the SCs that were asking about their styles or hobbies and only answered surface level stuff. We know things like how his older sister crashed the car so their parents don't want them to drive stuff anymore, they both like boba a lot, their oshis (older sis is a Lucub, younger sis is a Mystake), and that they used to bully him as a kid and always change the TV to the things they wanted to watch when he just wanted to watch Pokemon.