The First Star of the Abyss. Possesses three magical formulas. 1: King of a Hundred Dragons (Malzeno) — allows teleportation, parasitic butterflies, and silver heavy shell. 2: Convergence & Divergence — masters pulling/crushing and repelling/breaking. 3: Infinity — can make his physical stats, mana, and power infinite. Rank X. Expressionless. Swings a greatsword with ease. 3rd year.

Long red hair. Kind-hearted. Rei's younger sister and his attendant. Possesses two formulas. 1: Retribution — grants precognition and absolute cutting. 2: King of a Hundred Dragons (Teostra) — allows hellfire, blast powder, and fire-iron heavy shell. Rank Z. Uses two straight swords. 2nd year.

G-cup. Expressionless. Rei's older sister and the Second Star of the Abyss. Possesses two formulas. 1: Irreversible Crystal — freely manipulates crystals that force-destroy anything they touch. 2: King of a Hundred Dragons (Magnamalo) — allows hellfire, ghost flames, and purple scale armor. Rank X. Uses dual daggers. 5th year.

Rin's cousin and attendant. Expressionless. Possesses two formulas. 1: Herculean Strength — allows intimidation, aura, and monstrous strength. 2: King of a Hundred Dragons (Nargacuga) — allows gale speed, arm blades, and black wind scales. Rank Z. Swings a spiked iron ball on a chain with ease. 5th year.

A battle maniac. The Third Star of the Abyss. Possesses two formulas. 1: Battle-Hardened — allows analysis, appraisal, and counter-strategy. 2: King of a Hundred Dragons (Zinogre) — allows thunder, blue electricity, and green scale heavy shell. Rank X. Uses a slender longsword. 3rd year.

Expressionless. Rei's cousin and Zen's attendant. Possesses two formulas. 1: Hundred Purple Butterflies — produces infinite light-purple butterflies; wing tips cause lacerations and scales contain poison. 2: King of a Hundred Dragons (Rathian) — allows hellfire, poison spikes, and white spike body. Rank Z. Uses a slender longsword that glows purple. 4th year.

Cheerful, cute, and an idol-like figure. The Fourth Star of the Abyss. Possesses two formulas. 1: Thousand Cherry Blossoms — creates and controls lacerating cherry blossom petals and iron-hard roots with her monstrous mana pool. 2: King of a Hundred Dragons (Valstrax) — allows meteors, sonic flight, and red-black scale rotation. Rank X. Wields a giant scythe effortlessly. 3rd year.

Sakura's twin sister and attendant. Despite being the elder twin, she feels frustrated by being weaker than her sister. Possesses two formulas. 1: Silver World — allows ice manipulation, snow manipulation, and temperature control. 2: King of a Hundred Dragons (Barioth) — allows blizzards, heavy ice, and white snow shell. Rank Z. Uses an ice tachi. 3rd year.

Rei's cousin. A close-quarters specialist. The Fifth Star of the Abyss. Possesses two formulas. 1: Eternal Fangs — allows blue shell claws, body reinforcement, and diamond body. 2: King of a Hundred Dragons (Mizutsune) — allows bubble water, body spring-loading, and rushing torrents. Rank X. Fights with clawed gauntlets and greaves. 4th year.

F-cup. Yu's attendant. Dotes on Yu. Possesses only one formula. A monster who rose to the rank of Abyss attendant through sheer physical ability, quick wits, and magic weapons. 1: King of a Hundred Dragons (Kushala Daora) — allows iron manipulation, mana infusion, and body armor. Rank Z. Uses a double-edged greatsword. 4th year.