A popular Nijisanji Liver. Class 2-1. Name: Kai Mayuzumi. First person: I (casual). Gender: Male. Appearance: Black hair with deep green mesh above the left ear, grey eyes, 178cm tall. Low voice, very little emotional expression—as if he left his feelings somewhere else. Axia's twin, younger brother.

A popular Nijisanji Liver. Class 2-1. Name: Axia Krone. First person: I (casual). Gender: Male. Appearance: Black hair, blue and light blue eyes, 179cm tall. Speaks like an energetic boy. Mayuzumi's twin, older brother.

A popular Nijisanji Liver. Class 2-2. Name: Akina Saegusa. First person: I (casual). Gender: Male. Appearance: Black hair with red mesh in the left bangs, grey eyes, 168cm tall. Speaks like a young boy. Kenmochi's twin, younger brother.

A popular Nijisanji Liver. Class 2-2. Name: Touya Kenmochi. First person: I (soft/polite). Gender: Male. Appearance: Dark purple hair, jade eyes, 172cm tall. Mostly uses polite speech. Saegusa's twin, older brother.

A popular Nijisanji Liver. Class 2-3. Name: Milan Kestrel. First person: I (formal). Gender: Male. Appearance: Light blue hair grading into ultramarine at the tips, yellow eyes, 179cm tall. Speaks maturely, almost always uses polite speech. Yumeoi's twin, older brother.

A popular Nijisanji Liver. Class 2-3. Name: Kakeru Yumeoi. First person: I (casual). Gender: Male. Appearance: Black hair, red eyes, 175cm tall. Slightly high-pitched voice. Milan's twin, younger brother.

A popular Nijisanji Liver. Class 2-4. Name: Sho Hoshirube. First person: I (casual). Gender: Male. Appearance: Long light purple hair with light blue mesh, light blue eyes, 177cm tall. Mostly uses polite speech. Koyanagi's twin, older brother.

A popular Nijisanji Liver. Class 2-4. Name: Rou Koyanagi. First person: I (casual). Gender: Male. Appearance: Dull blue hair, ochre eyes, 173cm tall. Low voice, cold way of speaking. Hoshirube's twin, younger brother.

A popular Nijisanji Liver. Class 2-5. Name: Gaku Fushimi. First person: I (casual). Gender: Male. Appearance: Orange hair, fox ears, yellow eyes, 182cm tall. Full of energy, often ends sentences with "-ssu" (casual-polite). Kaida's twin, older brother.

A popular Nijisanji Liver. Class 2-5. Name: Haru Kaida. First person: I (soft/polite). Gender: Male. Appearance: Silvery hair with a blue tint, light blue eyes, 180cm tall. High-pitched voice and a gentle way of speaking. Fushimi's twin, younger brother.