Renka Ariake is the magical girl representing Kumamoto Prefecture. She possesses pale skin and large, heterochromatic eyes: her right eye is sky blue, while her left is pink. Her short white hair features thick bangs brushed mostly to the left, with curled forelocks framing each ear. Distinctive black odango-style hair accessories, adorned with gold designs, sit at the back of her head; the left emits flames and the right emits water.

Her magical attire is a pink and black dress with a floral tutu skirt. The top is pale blue-white, featuring three central buttons, with brown-and-white material covering the back. A pink flower decorates her chest, attached to cyan and black ribbon tails. She wears sharp brown-and-white heeled boots, their loose, petal-shaped cuffs displaying a gradient of blue, pale yellow, brown, and white.

Typically taciturn in her civilian life, Renka becomes more expressive when transformed, speaking with a distinct Kumamoto dialect. Her personality is marked by a self-imposed intensity and a rigid adherence to justice. She rarely smiles, reserving such expressions for close friends who understand her.

Renka's primary abilities focus on combat proficiency, notably wielding a lance. Her transformation incantation declares: *"Resting in the mists of Yae... O hazy flames, which light the path ahead, lead on, with diligent effort. This I humbly, humbly beseech thee!"*

Within the anime, she features prominently in the "Kumamoto Prefecture" story arc (episodes 18–20), confronting supernatural threats specific to her region. Her role emphasizes protecting Kumamoto's cultural and environmental integrity. She collaborates closely with her misaki (familiar), Ekuu, who aids her in her duties.