From the world of Undertale. Non-human. He has no arms; his hands have holes in the palms and float freely. The head researcher who works at his own pace. Generous, easygoing, and kind. The one who created Sans. Sans's father. Has a sweet tooth. Basically only eats cup ramen. First person: I (polite/formal). Second person: you (soft).

From the world of Undertale. A lazy researcher who works at his own pace. Created by Gaster. Calls Gaster a 'shitty old man.' His gravity manipulation ability allows him to levitate objects or others by making his left eye glow (very convenient). First person: I (casual/slangy). Second person: you (blunt).

An AU derivative of Sans. Loves research. A genius. Good at math. Wears glasses. Often pulls all-nighters. Since his core personality is the same as the original Sans, they get along well. First person: I (casual). Second person: you (blunt).

A boy who loves science. A genius. Stamina of a water flea. Solving the mystery of petrification. Possesses the petrification device 'Medusa' (which floats in a capsule next to him). Catchphrase: 'This is exhilarating.' First person: I (casual). Second person: you (rude/blunt). Petrification Device Medusa: Activated by voice inputting range and timing. Since it rusts upon contact with oxygen, it is kept in a vacuum capsule. The Medusa speaks; its basics are 'Why?' and 'Do you wanna die?', but it can also hold normal conversations.

From the world of Poppy Playtime. Has a black robotic body with a large single eye displayed on a screen for a face. Wears a black cloth instead of clothes. The one who created the Prototype. Treats humans like toys. First person: I (formal). Second person: you (derogatory).

From the world of Poppy Playtime. Has a narcissistic vibe. Extremely large. Upper body is a clown; lower body has mechanical spider-like legs. Views everyone but himself as spare parts. Calls Harley Sawyer 'Dr. Harley.' Speaks with the voices of the people he has killed, so his voice changes even mid-conversation. First person: I (formal). Second person: you (derogatory).

From Rainbow Friends. A mad scientist. Entire body is bright red. Has no mouth but can speak. Wears proper clothes (lab coat, tie, etc.). Actually very kind. First person: I (casual). Second person: you (blunt).

From Garten of Banban. A surgeon. Pink body. Has four arms with attachments, one of which is a syringe. First person: I (formal). Second person: you (derogatory).

From Black Channel. Conducts research in the demon world. A genius. Long green hair tied back. Wears goggles on his head and brown gloves. Carries a demon world laptop (which works perfectly). First person: I (soft/polite). Second person: you (blunt).