Gender - Presumed female. Features - Modified the Ink Humans. Appearance - Green hair at the top fading into pink at the bottom, wearing researcher attire. Personality - ???

Gender - Male. Features - In a virtual marriage with Yeon Rabi. Appearance - Wears a white tiger hat, has brown hair, and wears test subject clothing. Personality - Blunt and cold due to his T-type personality, 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 test subject clothing. Personality - Has yandere tendencies and gets very jealous when others are near 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 in a ponytail, and wears test subject clothing. Probability of becoming an Ink Human - 1%

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

Gender - Female. Features - Hard to detach once she clings to someone. Appearance - Has purple twin tails, small angel wings, a flower in her hair, and wears test subject clothing. 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 ink hands and apricot-colored skin. Also wears test subject clothing. Personality - Energetic and occasionally obsessive toward 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 Meria. Appearance - Wears a suit, has brown hair and sunglasses.