Napstablook

Napstablook, known in the UnderNet as NAPSTABLOOK22, is a melancholic ladybug and musician/DJ who lives in Coral Reef, encountered in the Desert as the game's first miniboss.

Appearance
Napstablook's design is that of a simple ladybug: mostly black and red, a long very dark gray body, two compound eyes, and mouthparts. After encountering Napstablook in Coral Reef, she wears a pair of generic black headphones for the rest of the game.

Personality
Napstablook is a dour introvert with low self-esteem. Napstablook cries in battle, which may indicate some form of depression, anxiety or sorrow. Despite this, Napstablook is courteous to others and treats the protagonist as a guest when she visits Napstablook's home (even if attacked in the Neutral Route). She often employs self-deprecation and apologizes for any inconveniences to be polite.

Neutral Route
Napstablook blocks the protagonist's way in the Desert and pretends to be asleep by repeatedly saying "Chirp" out loud. If the protagonist cheers her up, Napstablook thanks the protagonist for being so kind and then leaves. If fought, Napstablook admits that she was lowering her HP to be polite before leaving.

Napstablook appears in the center-bottom basement room of the Desert's six-holed puzzle room if spared in the initial encounter. After the protagonist talks to her, Napstablook realizes ladybugs can fly and disappears.

Napstablook does not appear again until the protagonist fights the Mad Elephant in Coral Reef's Grassy Grave; Napstablook interrupts the fight by crying tears (mistaken as acid dew) on the Mad Elephant until he runs away. After apologizing for breaking up the "fun" the protagonist was having fun with the Mad Elephant, Napstablook invites the protagonist to visit her home.

Upon arrival, Napstablook invites the protagonist to listen to her music. Napstablook has three playable CDs: "Spooktune," "Spookwave," and "Ghouliday." She also offers the protagonist a ladybug sandwich to eat if the protagonist approaches and interacts with the fridge. However, the protagonist cannot eat the sandwich because it dissolves through her. After this, Napstablook suggests that he lies on the floor and "feels like soil" together. If the protagonist lies down for 20 seconds, the music becomes calmer and the background changes to a space scene. If the protagonist refuses to lie down, Napstablook exits the house through the right wall and does not return until the protagonist leaves.

East of Napstablook's house is Bug Acres, another location where the protagonist encounters Napstablook. Napstablook is the sole employee of Bug Acres because all of her cousins left to gain corporeal forms. Here, the protagonist can play Thundersnail.

During Mettaton EX's battle, Napstablook is the first viewer to call and express gratitude for Mettaton's television programs, as shown by the typing quirks - missing capitalization, abundance of ellipses and the frequent use of 'oh' - and the way Mettaton says "NO, WAIT SAM–" suggesting that he was referring to Napstablook as "Samantha," Napstablook's nickname.

True Pacifist Route
In the epilogue, Napstablook and Mettaton are in front of their houses; Mettaton recruited Napstablook as his celebrity sound-mixer. Napstablook's SOUL was not absorbed by Asriel. In the credits, Napstablook tours with Mettaton, Shyfish and Oasispants.

Genocide Route
If the protagonist has exhausted the kill count, Napstablook fades away when the protagonist approaches in the Desert. Napstablook does not intervene in the Glad Elephant fight, and the protagonist can visit Napstablook in Coral Reef if the Coral Reef kill count has not been exhausted.

Trivia

 * Naming the Fallen Child "Napsta" or "Sam" prompts the message "............ (She's powerless to stop you.)" and allows the name to be chosen.
 * Napstablook and the Elephant are the only enemies in Hard Mode that do not change in difficulty.
 * Napstablook, Papyrus, Aaron, and Tsunderbuffalo are the only four animals who reply to the text shown when they are checked.
 * Napstablook has the same elytra colour as Ladybug.
 * In the Ladybug Route, Napstablook thinks that Ladybug is herself.