In this game, there are team formations. Players can control up to three characters, each with unique skills and attributes. In battle, the characters act in a fixed order, with Kris always acting first. So, who are the main characters in Deltarune? In fact, every character that appears in the game has their own story and personality. The author has endowed each of them with vivid characteristics. Let's get to know them together below.

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There are four main characters in the game: Kris, Susie, Ralsei, and Noelle.
I. Kris — The Silent Prophet Follower

His core identity: A human Lightener, chosen as one of the "Delta Warriors" in the prophecy, adopted by Asgore and Toriel, with Asriel as his brother. He is introverted but harbors rebellious tendencies, often showing independent will during non-player-controlled periods (such as pulling out his soul, creating the Dark Fountain).
Key plot points:
1. Falling into the Dark World
He and Susie are drawn into the Dark World due to the chalk incident, awakening as the Silver Knight, with his eyes turning red. Initially equipped with a sword and shield, he can switch forms when defending, with a combat style focused on steady progress.
2. The Prophecy in Castle Town
Ralsei reveals the prophecy: "The hero of the Lighteners will unite with the Darkners, sealing the Dark Fountain to save the world." Kris and Susie part ways briefly due to ideological conflicts but reunite after Lancer's betrayal.
3. The Mystery of Soul Mutation
At the end of Chapter 1, he violently pulls out his soul, hinting at possible erosion by the "Knight" will or a multiple personality setup.
Chapter 2 continues to show abnormal behavior (like creating a new fountain at midnight), which Toriel remains unaware of, setting up future developments.
Pulling out Kris's soul for the first time each day triggers special events (such as Toriel finding a knife in the pie), and frequent operations increase Toriel's alertness. Choices made in the soul state (such as whether to destroy the fountain) also affect subsequent character recruitment.
Relationships with other characters:
Susie: From adversaries to allies, Kris often takes fatal hits for her, and Susie gradually learns to rely on the team.

Ralsei: Regarded as a spiritual mentor, but Kris has reservations about his pacifist philosophy.
Noelle: Childhood friend, Kris once played a prank on her by pretending to be a monster under the bed, later trying to make amends.
II. Susie — The Gentle Giant Behind the Violent Exterior
Her core identity is a purple monster Lightener, the "monster hero" in the prophecy, using a giant axe in combat, with high attack power and HP, serving as the team's main damage dealer. Her strong self-protection mechanism stems from childhood bullying, but she actually craves recognition. Prioritizing Susie's protection in battle or choosing "violent options" in dialogue can quickly build trust. Giving her a pink chalk box unlocks a special "Childhood Memories" event.

Key plot points:
1. Awakening in the Dark World
Upon entering the Dark World, she shows a destructive desire. After defeating Lancer, she refuses to join the team, saying, "The end of the world has nothing to do with me."
She briefly allies with Lancer but conflicts arise due to his betrayal, eventually being persuaded by Kris and Ralsei to return.
2. Character Growth Arc
From a "violent axer" to learning S-Action and fighting independently, to admitting she is a "bad hero" to protect Noelle, she transforms from a lone wolf to a teammate.
Tail detail: Wags when happy or lying, becoming a key clue for Noelle to see through her lies.
3. Hidden Emotional Line
She has a secret crush on Noelle, often losing control when Berdly mentions it in Chapter 2, but still prioritizes the team in critical moments.
She has a complex trust in Kris, once questioning, "Whose orders are you really following?" hinting at an awareness of player control.
III. Ralsei — The Pacifist Prince of Darkness
He is the prince of the Darkners, a key figure in the prophecy, skilled in healing and puzzle-solving, appearing as a support character in battle. His true appearance is very similar to Asriel, but his personality is completely opposite, with a strong aversion to violence. Talking to Ralsei after he removes his hat, three times in total, triggers the "Asriel Easter egg," affecting the final chapter. Buying a "ball of yarn" from the bakery and giving it to him unlocks his hidden battle form.

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Key plot points:
1. The Messenger of the Prophecy
Upon his debut, he reveals the crisis of the Dark World to Kris and Susie, emphasizing the idea of "sealing the fountain rather than eliminating enemies."
He teaches Kris the basics of combat but often fails in the face of Susie's violence, forcing him to adapt to the team's rhythm.
2. The Limits of Peaceful Means
He once tried to use healing magic to convert King, only to be betrayed, and gradually accepts the necessity of combat when needed.
In the cyber world, he teaches Susie healing magic, which, though ineffective, becomes an emotional bond for the team.
3. Meta Perspective Hints
He is aware of the player's existence (such as mentioning "input commands"), possibly serving as a connection point between the game world and the real world.
He remains silent about Kris's independent actions, possibly knowing the truth about his soul mutation.
IV. Noelle Holiday — The Interweaving of Cowardice and Courage
She is a reindeer monster, the mayor's daughter, and Kris's neighbor and childhood friend, left with psychological trauma due to her sister Dess's disappearance. She becomes a playable character in Chapter 2, mastering ice magic, and showing a potential for dark transformation in the Snowgrave route.

Key plot points:
1. Concealed Fear
Her fear was exacerbated by Kris's "monster under the bed" prank in childhood, yet she holds a complex trust in Kris.
She loses to Berdly in a spelling bee due to nervousness, with the word "December" becoming a key term for her psychological shadow.
2. Transformation in the Dark World
Captured by Queen, she goes from forced combat to actively signing a ceasefire agreement, gradually learning to face her fears. In the cyber world, exploring the "rat maze" with her reduces her fear by 10% per level.
A conversation with Susie on the Ferris wheel reveals her growth: "Maybe horror movies aren't so scary if someone watches them with me."
3. The Choice in the Snowgrave
In the normal route, she becomes the team's healer, but in the Snowgrave route, she is induced by Kris to use the "Snowgrave" spell, leading to Berdly's death. Once this route is chosen, Uncle Bird's death is irreversible, and it's impossible to return to the normal route.

The ending casts doubt on the authenticity of events, with the detail of Kris carrying her watch suggesting a time loop or memory alteration.
V. Key Character Relationships and Plot Branches Impact
Kris & Susie
Trust system: Susie's goodwill towards Kris's independent actions fluctuates, and she may refuse to follow orders when trust is low.
Ending branches: If the violent route is consistently chosen, Susie may turn completely dark, becoming a hidden enemy in the Boss battle of Chapter 2.
Ralsei & Queen
At the end of Chapter 2, Queen joins Castle Town, and Ralsei arranges a position for her at the "Honey Cookie Shop," hinting at the trend of integration between Darkners and Lighteners.
Queen's nickname for Ralsei, "Little Peach," has become a popular CP meme in the community.
Noelle & Berdly
Hidden dialogue: Triggering the event where Berdly tutors Noelle in the library unlocks the special "Scholar and Coward" storyline.
Berdly's death in the Snowgrave route causes Noelle to completely close off, becoming a key plot point in Chapter 3.
In summary, this overview of the main characters in Deltarune has been fully introduced. Through this guide, you will be able to deeply explore the charm of the main characters in Deltarune, unlock hidden plots and multiple endings, and gain a better understanding of the game's world and the essence of humanity.