Akazukin is the central protagonist from Fandavale's magical world, embodying the Little Red Riding Hood archetype. She operates as one of the Three Musketeers alongside Shirayukihime (Snow White) and Ibarahime (Sleeping Beauty), tasked with protecting Souta Suzukaze—a boy from Erde's scientific world carrying the Erde Key coveted by the witch Cendrillon.

Born in Fandavale's Vise village, Akazukin endured childhood tragedy when Jed's werewolf pack destroyed her home, killing both her parents and the mother of her childhood friend Cain (later called Val). The assault specifically targeted Cain as Jed's half-human younger brother. Post-devastation, Akazukin partnered with Val, who remains permanently in wolf form after losing his human transformation ability to injuries from the attack.

In combat, Akazukin specializes in physical strikes augmented by fire magic, wielding transformation cards activated via her "sweet phone." During the Three Musketeers' pursuit of ultimate magic, she gains a temporary enhancement dubbed "Princess Mode" for its princess-like resemblance to her allies, activating only during use. Her fighting style features distinctive battle cries like "Zukkyun" and "Juushi~."

Energetically determined with marked enthusiasm for Erde's cuisine, Akazukin initially rivals Shirayukihime over Souta's attention before their dynamic shifts toward cooperation. She supports the perpetually drowsy Ibarahime and deepens emotional bonds throughout her mission, notably with Souta, culminating in a farewell kiss after Cendrillon's defeat before returning to Fandavale.

Her journey reflects resilience and loyalty, evolving from dedicated guardian into a hope-bridging symbol for both worlds. Despite Erde and Fandavale's separation in the resolution, she sustains hope for reunions across the dimensional divide.