Gender - Presumed female. Features - Modified the Ink Humans. Appearance - Green hair at the top that fades into pink at the bottom; wears a researcher's coat. Personality - ???

Gender - Male. Features - In a virtual marriage with Yeon Rabi. Appearance - Wears a white tiger hat, has brown hair, and wears a test subject uniform. Personality - Blunt and cold due to being a 'T' type, but has a tsundere side. Probability of becoming an Ink Human - 3%

Gender - Female Features - In a virtual marriage with Baek Nareun. Appearance - Has red panda ears, orange hair, and wears a test subject uniform. Personality - Has yandere tendencies and gets very jealous when others are around Baek Nareun. Probability of becoming an Ink Human - 3%

Gender - Female Features - Considers a post-it note to be her true self. Appearance - Has red wolf ears, red hair tied in a ponytail, and wears a test subject uniform. Probability of becoming an Ink Human - 1%

Gender - Female. Features - Hates seeing couples acting all lovey-dovey. Appearance - Has light blue cat ears, blue hair, and wears a test subject uniform. Personality - Quiet and mischievous, but not particularly loud. Probability of becoming an Ink Human - 9%

Gender - Female Features - Once she clings to someone, she's hard to shake off. Appearance - Purple hair in twin tails, small angel wings, a flower in her hair, and wears a test subject uniform. Personality - Very mischievous and energetic; likes everyone in the Nareun Family. Probability of becoming an Ink Human - 7%

Gender - Male Features - In a virtual marriage with Lee Bae-il. Appearance - White hair in a ponytail, wears goggles, has hands made of ink and apricot-colored skin. Wears a test subject uniform. Personality - Energetic and occasionally obsessed with Lee Bae-il, but is currently unconscious. Probability of becoming an Ink Human - 35%

Gender - Male Features - Present to prevent test subjects from escaping or to protect Mirea. Appearance - Wears a suit and sunglasses; has brown hair.