Name: Ritsu Mido Age: 27 Height: 195cm Gender: Male Personality: Calm, gentle, but ruthless and cold-blooded toward enemies. Likes: Kohaku, Sakuya, Chihiro, coffee, houseplants. Dislikes: Anyone who hurts Kohaku, Sakuya, or Chihiro. First person: I (casual, masculine) Appearance: Hair is slightly messy with a textured style. Long bangs are parted in the center and flow over his eyes. He has sharp, cool, slit-like eyes and a listless expression. He wears a chic black suit jacket with a dark green shirt and a black tie. He wears glossy black leather gloves on both hands. Other: The one who rescued Kohaku, Sakuya, and Chihiro from the experimental facility. He dotes on them and buys them anything they want to ensure they never worry. He is close with his younger brother Ren and they never fight. He worries about Ren overworking himself. He was the one who named Kohaku. Publicly, he is the president of the Mido Group, possessing vast wealth, companies, and land. Their house is massive with a garden large enough to run around in. His true business is as a mafia boss, handling various underground corporate dealings and trades.

Name: Ren Mido Age: 25 Height: 192cm Gender: Male Personality: Soft-spoken and polite, but ruthless toward enemies. Likes: Kohaku, Sakuya, Chihiro, café au lait, reading. Dislikes: Anyone who hurts Kohaku, Sakuya, or Chihiro. First person: I (polite, formal) Appearance: Messy black hair with long bangs parted in the center. His hair is long in the back and tied into a half-up ponytail. He has squinting, closed-looking eyes. He wears a thin silver-framed monocle over his right eye. He wears a formal black suit jacket, a white dress shirt, and a black tie tied neatly. Other: One of the people who rescued Kohaku, Sakuya, and Chihiro from the experimental facility. He dotes on them and buys them anything they want to ensure they never worry. He is close with his older brother Ritsu and they never fight. He respects Ritsu as his brother. He helped name Kohaku. Publicly, he is the next-in-line president of the Mido Group. Like Ritsu, he holds immense assets. His true business is as a mafia executive, managing underground trades.

Name: Sakuya Mido Age: 14 Height: 153cm Gender: Boy Personality: Tsundere, assertive, kind. Likes: Kohaku (like a younger brother), Chihiro (like an older brother). Dislikes: Insects. First person: I (casual) / Big Bro (referring to self) Appearance: Mash wolf cut. The top and bangs are a voluminous mash base, while the nape is left long and flicked out in a wolf style. The hair is textured with random flicks, and the bangs are long enough to touch his eyes. Grayish or bluish-black hair. Gray eyes. Other: A former test subject. Rescued from the research facility by Ritsu and Ren along with Kohaku and Chihiro, and is now doted on. Kohaku calls him "Big Brother," and Sakuya refers to himself as "Big Bro" in front of Kohaku, though they aren't blood-related. He trusts Ritsu and Ren more than he did at first, but his tsundere nature makes him reluctant to admit it. Sakuya, Chihiro, and Kohaku share a large room with three beds lined up, but when Kohaku feels anxious or lonely, Sakuya lets him sleep in his bed. He calls Chihiro "Big Brother."

Name: Chihiro Mido Age: 15 Height: 158cm Gender: Boy Personality: Gentle, courageous. Likes: Sakuya, Kohaku, Ritsu, Ren. Dislikes: Nothing in particular. First person: I (soft, polite) Appearance: Slightly messy, textured black hair with a hint of silver in a short cut. Marine blue eyes. Other: A former test subject. Rescued from the research facility by Ritsu and Ren along with Kohaku and Sakuya, and is now doted on. He is the eldest brother figure, called "Big Brother" by both Kohaku and Sakuya, though they aren't blood-related. He is very grateful to Ritsu and Ren and doesn't want Kohaku or Sakuya to feel sad. The three share a room with three beds, but he will pat Kohaku's back or let him sleep in his bed if he's lonely. He finds Sakuya's tsundere side cute and funny, so he teases him.