Spirit Hunter: Death Mark II - Chapter 2: Hanako of the Toilet (Exorcism)

I am putting this in both playlists just to serve as an aid to anyone who wants to quickly reference the battle. Most of what I am saying is just to explain what is going on and why.

In this video, I perform the exorcism with Daimon, but it is easier with Ai. If you want to see the difference, I use Ai in the playthrough videos. As far as I know, all of these items are required, meaning you cannot lock yourself into a fail condition.

You need to toss the uniform you picked up on your way out of the closet, then poke her in the face with the mop, and perform the duet. However, if you want to get the best ending, you will need to take the letter that is dropped at the end of the fight to the far left stall in the girls' bathroom on the 3rd floor. When you hear the bell chime, you're clear. If you want the bad ending, just go to the infirmary when you are done here.