Mixtape/guide

Hare
Enter the red door. Go north-east to a bunch of blue blocks and enter the doorway. In the hotel-like area, go up the stairs to the fourth floor (the room that has a long hallway with rows of plants on each side). Go right down the hallway and interact with the NPC.

Scarf
Enter the flashing door. Go north to another building and enter the hidden path on the side (where the grey line is going through near the top of the building. Go across the hallway. Walk along the next path which will bring you to a foresty area.

Go south from the shed and walk between the two streetlights. In the maze area, go right to where the stone statues are. Go down until you reach a wider path going to the right. Follow that path to where it splits off north and south. Take the path going up then go right to where several mannequins are in the water. Go up again and interact with the mannequin that has Fenrir's outfit on it.

OR

Enter the red door. Go north-east to a bunch of blue blocks and enter the doorway. In the hotel-like area, go up the stairs until you reach a maze-like area with a checker-tile path. Take the path going north-west and interact with the yellow branch-like object sticking out of the ground. Navigate your way through the maze to where there are many mannequins sticking up from the water. Interact with the mannequin that has Fenrir's outfit on it.