Sam

Sam is a male raccoon masquerading as a girl. He goes by the name Samantha while in disguise so his true name is unknown. During the scene where his gender is revealed he's only referred to as Sam. It's unknown why Sam conceals his identity but his kindly facade melts away when Scott catches him changing revealing him to be cruel and sadistic.

Rape Scene
If Scott decides to spy on Samantha in the photography room he will spot her wearing a padded bra. At first he assumed Samantha was just flat chested but when he gets caught Sam pulls Scott into the room. Scott soon learns about Sam's true gender when he removes his skirt and panties revealing his penis.

To prevent Scott from telling anyone he pushes him onto the table and rapes him. Scott is traumatized by the event but doesn't tell anyone about it. The next day Scott gets the Murder Ending.

Getting this ending unlocks the "It's a trap!" achievement. A "trap" is a common term for extremely convincing crossdressers and the phrase "It's a trap!" is a popular internet meme that originates from a line delivered by Admiral Ackbar in the famous sci-fi movie Star Wars Episode VI: Return of the Jedi.