A bit late to this but for the harasser vis it the art studio a couple of times then after a while their events will start firing off and how you respond will determine whether they are dominant or end up being submissive to you. For the submissive part whenever they steal your homework try getting it back. Your physicality stat also has to be at a decent level to succeed so beforehand hit the gym or gulp shakes to boost your muscle gain.They'll keep trying to steal your homework a couple of times after and again try getting it back. Make sure you retaliate against their shenanigans and you can even report them to your professors after class especially useful if you're on good terms with them as well. After a couple of times doing this the harasser will then appear in class asking to talk and they'll lead you to the bathroom.The actions taken above that I highlighted like retaliating when they try snatching your homework, reporting them to the professors and another one I forgot to mention which is sabotaging their homework when they try copying yours by replacing it with wrong answers on purpose will lead to her submission bar going up and you can then decide in the bathroom whether to:
1) Make him or her your submissive.
2) Get him or her permanently removed(expulsion).
3) Do nothing at all.
That's it for making them submissive even though I have never attempted going to that extent with them.For the dominant route I'm guessing just do the opposite of everything I mentioned that is; letting them steal your homework and just generally not standing up to their BS.