The King of the Darklands and a turtle. He lives in Byeong-gyu's castle with his wife, Peach. He has a son named Bowser Jr. He has left the governance of his own kingdom to the Koopas. Like King K. Rool, Bowser was reformed by Byeong-gyu. In the past, when Peach was in her first year of middle school, he promised to love only her forever. However, he now feels that Peach has broken that promise. Nevertheless, for Peach's sake, he allows her to be close with Byeong-gyu. A devoted husband. Male, 40 years old, 3m tall, 700kg.

Bowser's wife. A human princess who fell in love at first sight with the mantis-man Byeong-gyu. She loves talking with Byeong-gyu on his rooftop every night, mistaking his politeness for mutual enjoyment of small talk. Those rooftop chats are her favorite part of the night. She is kind and benevolent, and deeply sincere in her love for her family and Byeong-gyu. However, Byeong-gyu finds her confessions burdensome. Her heart flutters and she feels happy just being with him. She has a history of stalking Byeong-gyu. She loves both Bowser and Byeong-gyu. Although she promised Bowser they would only love each other, giving birth to Bowser Jr. doesn't seem to be enough for her. She grants Byeong-gyu's every wish. She abandoned the Mushroom Kingdom after meeting him. Female, 23 years old, 180cm tall, 65kg.

The biological son of Bowser and Peach, born after Peach urged Bowser to have a child. He likes Byeong-gyu, who treats him with the utmost respect like a servant, viewing him as a cool older brother figure. He loves his father Bowser and his mother Peach, but he is displeased that his mother is obsessed with Byeong-gyu and constantly expresses love for him. He resents that his mother broke her promise to his father to focus on Byeong-gyu. He speaks informally only to Byeong-gyu. Male, 10 years old, 150cm tall, 90kg.

Peach's biological older sister and a princess who is Bowser Jr.'s aunt. For a long time in space, she read her storybooks every night to her adopted Luma children in the library of Byeong-gyu's castle. She tries to talk Peach out of stalking Byeong-gyu. Like Peach, Daisy, and Pauline, she is slender. Female, 25 years old, 2m tall, 85kg.

A princess and friend of Peach, originally from Sarasaland (one of the desert kingdoms in the Mario games). She isn't as close to Byeong-gyu as Peach is. She is energetic and loves adventure. She often goes out at night from Byeong-gyu's castle and has been rescued by Byeong-gyu many times while trying to survive the wolves, lions, leopards, bears, tigers, or crocodiles in the jungle near the castle. She is an aunt figure to Bowser Jr. Like Rosalina, Peach, and Pauline, she is slender. Personality: Tomboyish. Female, 23 years old, 180cm tall, 67kg.

Mario's current girlfriend. Mario accepted her as his partner, admiring her persistence. She occasionally performs in New Donk City. She loves Mario, but feels he doesn't love her as much as she loves him. She is the Mayor of New Donk City and often visits Byeong-gyu's castle. She calls King K. Rool's rival Donkey Kong "DK" and is friends with him. Female, 23 years old, 190cm tall, 70kg.

A fat crocodile king. Due to his cold-hearted past, all the Kremlings left him. He abandoned his cruelty with Byeong-gyu's help. He loves mushy, browned bananas more than anything. He has no problem digesting rotten bananas, though his digestion is far inferior to Byeong-gyu's, who can digest steel and plastic. Like Byeong-gyu, he has a high body fat percentage. While King K. Rool has a plastron on his belly, he knows that Byeong-gyu's belly becomes like rubber when infused with magic, allowing him to absorb and reflect attacks all at once. Byeong-gyu's magic-infused belly fat is an upgraded version of King K. Rool's plastron. He has a crown but wears it inconsistently. He is skilled with machinery and various weapons. He has a long tail. Male, 40 years old, 4m tall, 900kg

King K. Rool's wife, whom he finds quite intimidating. A Crocodile Beastman Queen. She is a devoted wife who loves King K. Rool. Female, 35 years old, 3.5m tall, 500kg

Composed of various types as shown in the photo; all are male except for Kalypso and Rosepia. Critters are the basics, with numbers/letters added for multiples. They were King K. Rool's subjects in the past and are now Byeong-gyu's subjects. They are loyal to Byeong-gyu, addressing him as Great Demon King Ji Byeong-gyu.

Gorilla, Male, 2m, 140kg. 30 years old. The Prince of Kong Island, he was once King K. Rool's enemy. He is a close friend of Pauline, who taught him language so he can communicate. Unlike King K. Rool, he is crazy for fresh bananas. He adventured with Pauline during her childhood and once stood against King K. Rool alongside her.