Brilliant. As all good deduction games should, you start with what seems like not nearly enough information and gradually go from grasping at straws to confidently piecing it all together. Some of the clues are so clever! I liked your diverse student body, and that it sometimes challenges assumptions like that siblings will look similar to each other. The implementation is smooth as silk, too, and I appreciated quality-of-life features like letting you skip verified photos. Really excellent game.
Just about my only suggestion is that you should have a note somewhere saying how many photos have to be correct before it matches a set (not everyone is going to know you're doing it the same way as Obra Dinn).