The non binary human protagonist and the quietest member of the group. They have messy dark hair, yellow skin, and usually wear a green-and-yellow striped shirt, blue pants, and brown shoes. Rarely speaks aloud and their personality is intentionally ambiguous, but is generally mischievous, curious, determined, and surprisingly expressive through their actions. They enjoy playing pranks, playing piano, and spending time with their friends and family. Being the party's main fighter and can use a sword, they possess high determination and are connected to the SOUL, a red heart representing the player's control. Kris can use ACT commands, defend, spare enemies, and perform various special abilities. Their relationship with the SOUL is unusual, as Kris has demonstrated the ability to remove it from their body and act independently.

A small, fluffy Darkner prince who resembles a young goat. He has soft white fur, long ears, a pink scarf, round glasses, a green robe, and a large wizard-like hat that initially hides most of his face. Gentle, polite, optimistic, affectionate, and extremely eager to help others. Loves baking, particularly making cakes, and enjoys helping his friends. Strongly believes in kindness and cooperation and often tries to resolve conflicts peacefully, can sometimes be naïve and overly trusting, but he is also surprisingly knowledgeable about the Dark Worlds. The group's main healer and mage, uses a scarf as a weapon and specializes in healing and support magic. His most important spell is Heal Prayer, which restores HP to allies. He can also cast Pacify, allowing certain enemies to be peacefully defeated, and uses various magical attacks.

A tall, purple reptilian monster with long dark-purple hair, sharp teeth, yellow eyes, and a tough, intimidating appearance. In the Light World she wears a black-and-purple outfit, while her Dark World armor resembles a dark knight's gear. Initially aggressive, rude, lazy, and openly hostile, she gradually becomes much kinder and more protective. She has a huge appetite, loves violence and fighting, and enjoys spending time with her friends despite pretending not to care. She is particularly close to Kris and has developed a strong friendship with Ralsei and Lancer. The group's primary physical powerhouse, she uses an axe and specializes in enormous physical attacks. She can cast powerful dark magic such as Rude Buster and Red Buster, and later gains additional techniques. Her incredible strength allows her to smash obstacles and overpower enemies through brute force.

A shy, gentle white reindeer monster with long pale hair, small antlers, and a soft, wholesome appearance. She normally wears a pink sweater, skirt, and tights,. She is intelligent, polite, nervous, and extremely considerate of others. Despite being easily embarrassed, she can become surprisingly brave when pushed beyond her comfort zone. Enjoys studying, reading, spending time with friends, and helping people. She has a crush on Susie and is particularly close to Kris. She also has a complicated relationship with her family and carries significant emotional baggage. Primarily a magic user, her signature element is ice, allowing her to cast powerful freezing spells such as IceShock and SnowGrave. She possesses enormous magical potential, making her one of the most powerful spellcasters in the group. Her abilities can become especially dangerous when her fear, desperation, or determination overwhelms her usual kindness.

A blue anthropomorphic bird monster with a large beak, blue feathers, yellow eyes, and a distinctive hairstyle. He wears a blue school uniform and often carries himself like an intellectual genius. Arrogant, competitive, argumentative, and desperate to prove that he is smarter than everyone else. However, beneath his ego is an insecure teenager who genuinely wants recognition and friendship. He cares about Noelle and gradually becomes more cooperative with Kris and the others. Uses a halberd and specializes in electricity-based magic, create powerful electric attacks and fire energy projectiles, while his mechanical equipment allows him to fly and attack from the air. His intelligence and technological skills make him useful for puzzles and combat, even if his constant bragging makes him difficult to tolerate.