I agree with Bob105 but if you don't want to make a more adult sized model of her then you don't need to make any lewd for her
Viewing post in Should Chiaki become lewdable? comments
This, I wouldn't mind if she got like an After Story Chapter that takes place years later where you can then add lewds to her . But with the current flow of the story, I would like it better if she stayed the way she was and become like a little sister who simply admire the MC and only later her feelings turned romantic.