CaptainBl00d, you are likely already aware, but FYI if the MC visits Azalea for "relief" the morning he first goes to school, there is a missing avatar for the MC on the left while on the menu screen.
There's a similar problem when the MC first arrives at class to find the teacher is a grey silhouette with text on it instead of a real person.
I won't point out further examples so I don't pester you too much. I'm sure you can pretty easily find anything else like this.