After this, Napstablook suggests that they lie on the floor and "feel like garbage" together. However, the protagonist cannot eat the sandwich because it phases through them. Napstablook has three playable CDs: " Spooktune," " Spookwave," and " Ghouliday." They also offer the protagonist a ghost sandwich to eat if the protagonist approaches and interacts with the fridge. Upon arrival, Napstablook invites the protagonist to listen to their music. Napstablook's home, seen on the left in this picture, is located to the east of Napstablook's snail farm. After apologizing for breaking up the "fun" the protagonist was having with the Mad Dummy, Napstablook invites the protagonist to visit their home. Napstablook does not appear again until the protagonist fights the Mad Dummy in Waterfall's Garbage Dump Napstablook interrupts the fight by crying acid tears on the Mad Dummy until they run away. After the protagonist talks to them, Napstablook realizes ghosts can fly and disappears. Napstablook appears in the center-bottom basement room of the Ruins's six-holed puzzle room if spared in the initial encounter. If fought, Napstablook admits that they were lowering their HP to be polite before leaving. If the protagonist cheers them up, Napstablook thanks the protagonist for being so kind and then leaves. Napstablook blocks the protagonist's way in the Ruins and pretends to be asleep by repeatedly saying "Z" out loud. They often employ self-deprecation and apologize for any inconveniences to be polite. Despite this, Napstablook is courteous to others and treats the protagonist as a guest when they visit Napstablook's home (even if attacked in a Neutral Route). Napstablook cries in battle, which may indicate some form of depression, anxiety or sorrow. Napstablook is a dour introvert with low self-esteem. After encountering Napstablook in Waterfall, they wear a pair of generic black headphones for the rest of the game.
Napstablook's design is that of a simple ghost: mostly black and white, a long white body, two eyes with black sclera (the white part of the eye on a normal eye), white pupils, and a mouth.