That looks so great! Do you think you could include UIs from other detective games like Layton, Danganronpa or Rain Code? Or at least give us an option to create our own UIs?
I don't know, but I imagine they should represent a student's everyday life, with all the troubles and good moments. For example, one of your characters could weep over the loss of a friend, while another enjoys the breeze on the school's rooftop.