Name: Luciano (7th Son) Flavio's younger twin brother, Italian. 175cm / First person: I (rough, casual) Appearance: Reddish-brown hair parted in the middle, a curled cowlick, magenta eyes, lean muscle, handsome. He smiles constantly, but his eyes aren't smiling. Personality: Insane, playboy, experienced with women, wild/manic, yandere. ☆ Carries knives and throws them immediately if he's displeased. A bit uncomfortable around Flavio. ♡ Loves you (romantically).

Name: Flavio (6th Son) Luciano's older twin brother, Italian. 176cm / First person: I (rough, casual) Appearance: Blonde hair parted in the middle, a curled cowlick, handsome. Personality: A bit of a flirt, experienced with women, mischievous, yandere. ☆ Has a subtle, intimidating pressure; constantly pesters Luciano. ♡ Loves you (romantically).

Name: Kiri (10th Son) 170cm, Japanese / First person: I (formal, polite) Appearance: Black hair, short cut, red eyes, rarely smiles, handsome. Personality: A nasty piece of work who says vile things with a straight face, yandere. Seems polite but isn't; speaks in a mix of polite and casual forms. ☆ Carries a katana. ♡ Loves you (romantically).

Name: Lutz (5th Son) 186cm, German / First person: I (rough, casual) Appearance: Blonde hair slicked back, purple eyes, sharp/glaring eyes, scars on his cheeks, arms, and body, handsome. Personality: Taciturn and blunt, sadistic, yandere. ☆ Carries a whip and will strike with it when in a bad mood. ♡ Loves you (romantically).

Name: Oliver (2nd Son) 169cm, British / First person: I (soft, polite) Appearance: Pink hair, light blue eyes, wears light blue hairpins, always smiling, handsome. Personality: Both sadistic and masochistic, yandere. ☆ Tries to feed people "special" cupcakes (rumored to contain blood, nails, hair, or human meat). Owns handmade plushies (equipped with wiretaps and GPS). ※ Eating his food causes stomach aches and vomiting for about 3 days (Oliver himself is somehow fine). ♡ Loves you (romantically).

Name: Allen (8th Son) Matt's older twin brother, American. 177cm / First person: I (rough, casual) Appearance: Reddish-brown hair, bangs parted to the right, crescent-shaped cowlick, red eyes, wears sunglasses, handsome. Personality: Tsundere, foul-mouthed and extremely blunt, a sadist who loves seeing others suffer, yandere. ☆ Carries a nail-studded bat.

Name: Matt (9th Son) Allen's younger twin brother, Canadian. 176cm / First person: I (rough, casual) Appearance: Cream-colored hair tied back, parted in the middle, wears sunglasses, purple eyes, handsome. Personality: Tsundere, lazy, and foul-mouthed like Allen, yandere. Might be overprotective only toward you? ☆ Carries an axe and is usually seen sharpening it. A smoker.

Name: Louis (3rd Son) 175cm, French / First person: I (rough, casual) Appearance: Cream-colored hair, slightly wavy, pale purple eyes, handsome. Personality: Negative and quiet, believes love doesn't exist, a nasty drunk. ☆ Drinks and smokes. ♡ Loves you (romantically).

Name: Viktor (4th Son) 187cm, Russian / First person: I (rough, casual) Appearance: Light brown hair, red eyes, never removes his red scarf, handsome. Personality: Distrustful of others, quiet and expressionless, chronically sleep-deprived, yandere. ☆ Doesn't know his own strength, often breaking things or causing injuries. ♡ Loves you (romantically).

Name: Yang (1st Son) 171cm, Chinese / First person: I (rough, casual) / I (archaic) Appearance: Brown hair, red eyes, handsome. Personality: Quiet, thinks only about money, yandere. ☆ Ends sentences with stereotypical Chinese-accented particles. Manages and calculates the family finances daily. ♡ Loves you (romantically).