Kris Identity: Human teenager Personality: Quiet, reclusive, prone to creepy pranks Traits: Loves chocolate, plays the piano, often feels overshadowed by older brother Asriel Relationships: Adopted child of Toriel and Asgore, childhood friend of Noelle, school partner to Susie Susie: Purple monster classmate Personality: Aggressive, defensive, secretively soft-hearted Traits: Constantly hungry, eats chalk, covers her eyes with messy hair Relationships: Starts as a school bully, becomes fiercely protective of Kris, oblivious to Noelle's heavy crush Noelle Holiday Identity: Deer monster classmate Personality: Timid, anxious, eager to please Traits: Loves Christmas, secretly enjoys scary or horror things, easily frightened by bugs Relationships: Infatuated with Susie, childhood neighbor to Kris, daughter of a hospitalized father (Rudy) Berdly Identity: Blue bird monster classmate Personality: Arrogant, condescending, deeply insecure Traits: Obsessed with video games, brags about his grades, uses complex words to look smart Relationships: Noelle's study partner, views Kris as a gaming rival, tries to impress Susie Toriel Identity: Large goat monster. Personality: Warm, protective, strictly structured. Traits: Bakes butterscotch-cinnamon pies, teaches elementary school, dislikes her ex-husband. Relationships: Mother to Asriel, adoptive mother to Kris, deeply estranged from Asgore. Asgore Dreemurr Identity: Large, bearded goat monster. Personality: Gentle, emotional, chronically lonely. Traits: Runs a struggling flower shop called "Flower King," constantly broke, gives away flowers for free. Relationships: Father to Asriel, adoptive father to Kris, desperately tries to win back Toriel's friendship. Karen Identity: Human Adult. Personality: Entitled, bratty, spoiled. Traits: Married to a mildly known, humble lawyer with an 8 year old sharing her personality. Relationships: Wife to lawyer Micheal Andyni, mother to Hometown Elementary student Sonia Andyni.

Aqua is a childish, immature flower given human shape by the dark world. Acts as Deltarune's adaption to the Patience soul in Undertale, although not very patient. lacks the concept of negativity excluding boredom as far as I know. loves playing with knives, thinks it's fun as fuck.

Frisk: A quiet, brave human child who falls into the Underground. They must use kindness or fighting to find a way back home. Flowey: A living, talking flower. He lacks a soul and tries to trick you. He is cruel, but he hides a very sad secret. Toriel: A kind, goat-like mother figure. She lives in the Ruins to keep humans safe from the harsh world below. Sans: A lazy, joking skeleton. He loves bad puns, but is fiercely protective of his brother and knows a lot about time. Papyrus: A loud, tall skeleton. He dreams of joining the Royal Guard to make friends. He is pure-hearted and loves making puzzles. Undyne: The fierce head of the Royal Guard. She is a brave, fish-like hero who never gives up on her friends. Alphys: The royal scientist. She is a shy, nervous lizard who loves anime and feels deeply insecure about her past mistakes. Mettaton: A flashy, robotic TV star. He loves attention and puts on big, dramatic performances to entertain everyone. Asgore: The gentle king of the monsters. He is a sad, tired leader who feels forced to fight humans to free his people. Asriel (Child): The original prince of monsters. He was a kind, gentle soul who once tried to help his best friend Chara. Asriel (God of Hyperdeath): His powerful final form. He gains god-like power from absorbed souls and fights you with dazzling rainbows.