Age: 11 Gender: Female Magic System: Mid-style/Belka Hybrid Device: Fusion-type Intelligent Device Sacred Heart (Nickname: Chris) Magic Color: Iridescent Kaiserfarbe Main Tactics: Close-quarters combat mixing magic with a focus on counters Position: Front Attacker Features: A bright and cheerful girl. She gives her all in everything and cannot stand injustice. She is the daughter of Nanoha Takamachi, with Fate serving as her guardian. Vivio calls both of them "Mama." Her device is an Intelligent Device that looks like a stuffed rabbit outside its crystal core. She communicates with Nanoha through gestures that Nanoha understands perfectly, suggesting a form of mental empathy. She is best friends with Corona and Rio. Adult Mode capable.

Age: 13 Gender: Female Magic System: Ancient Belka Device: Fusion-type Intelligent Device Asteion (Nickname: Teo) Magic Color: Light Green Main Tactics: Close & mid-range combat using the Hegemon style Position: Front Attacker Features: Full name is Heidi Einhart Stratos Ingwalt. A girl characterized by pale green hair and heterochromia (purple and blue eyes). She speaks politely. Her device takes the form of a snow leopard, an animal native to the Schtora region where Claus G.S. Ingwalt was active. However, instead of a fierce leopard, it appears as a lethally cute kitten—a leopard cub. Like Sacred Heart, it is a stuffed doll rather than a living creature. Adult Mode capable.

Age: 13 Gender: Female Magic System: Mid-Childa Device: Intelligent Device Scuderia Magic Color: Crimson Main Tactics: Strike Arts mixed with magic Position: None Features: Skilled in both striking and grappling with excellent bombardment capabilities, she possesses power rarely seen even in the older U-19 division. A slugger whose every technique is a finishing move. A natural, gifted talent. While serious, she occasionally shows her girlish side. Adult Mode capable.

Age: 13 Gender: Female Magic System: Modern Belka Device: Fusion-type Intelligent Device Huracan (Nickname: Uura) Magic Color: Deep Blue Main Tactics: Mixture of modern martial arts and traditional styles Position: None Features: Ponytail attribute. A technician. She has mastered counters, combinations, kicks, jabs, Chun-gwang-kwon, and the Hegemon style, wielding them as she pleases. She is childhood friends with Rinne. Her device is similar to Einhart's.

Age: 11 Gender: Female Magic System: Mid-Childa Device: Dagger-type Intelligent Device Branjell Features: Her combat style is Golem Creation, using terminal crystals as cores to imbue surrounding matter with mana and manipulate it freely. Creation Activation is the alpha and omega of her magic. Her basic tactic involves creating Goliath or Goliath's arms to fight. It is a complex magic combining inorganic manipulation with summoning magic to draw soil or rock from the ground. The "Nephilim Fist" technique applies golem-like control to her own body for auto-counters, though it can be countered due to her own slow physical speed. Nephilim Fist is an auto-counter applied to the caster, not a golem technique. It stores the techniques of Vivio, Rio, Einhart, and others, allowing her body to react and counter automatically. Best friends with Vivio and Rio. Adult Mode capable.

Age: 11 Gender: Female Magic System: Modern Belka Device: Solfège Features: Her combat style is Strike Arts combined with her family's martial art, Chun-gwang-kwon. Her magic style is Modern Belka with Flame-Thunder conversion, allowing her to emit fire and lightning simultaneously. In team matches, she displays explosive techniques like Twin Dragon Dance, Thunder God Palm, and Roaring Thunder Cannon, and shows superhuman strength by throwing Corona's golems. She has incredible lean muscle. According to Vivio and Corona, she has the highest mana and physical strength among them. Best friends with Vivio and Corona. Adult Mode capable.

Age: 17 Gender: Female Features: Her combat style is comprehensive magical warfare using "Iron Fist" techniques and "Eremian Crash" magic. A delicate young lady who gets embarrassed easily and has a gluttonous side. The essence of Eremia is an Eraser-type technique; when activated, dark light flickers in her hands, possessing enough power to gouge the arena or easily tear through Barrier Jackets with just a graze. It is a strike that erases everything it touches. It is revealed to be a passive ability that activates automatically when she feels her life is threatened. Described as a form of body-destruction art; if Miura's sword-drawing is for cutting, Eremia's Iron Fist is for erasing.