Koakuma

Overview

Koakuma is a demon character who debuts as the Stage 4 midboss in the bullet-hell shooter Touhou Koumakyou ~ the Embodiment of Scarlet Devil. The name is a generic designation for lesser demons rather than a personal proper name. Residing within the Scarlet Devil Mansion, she is primarily associated with its vast underground library. Despite appearing initially as an unvoiced minor enemy, she has attained enduring fan popularity—often nicknamed Koa—and frequently appears across official print spin-offs.

Appearance

Koakuma is characterized by her red hair, red eyes, and dark, bat-like demon wings attached to both her head and back. Her standard attire, derived from game sprite interpretations, features a long-sleeved white shirt paired with a dark vest, a matching long skirt, and a red necktie or ribbon. Her hairstyle varies across official works, appearing short in Touhou Sangetsusei and Touhou Chireikiden, but long in Touhou Bougetsushou. She is also drawn wearing modern casual clothes in Touhou Chireikiden, while fan art occasionally incorporates pointy ears or a demon tail.

Personality

According to notes from creator ZUN, Koakuma naturally possesses a whimsical and mischievous temperament, frequently acting on impulse without planning ahead. Within fan community works, she is most commonly portrayed as a gentle, industrious assistant working diligently in the library, though alternative portrayals emphasize a more aggressive, playful, or inherently devilish side.

Abilities

In combat encounters, Koakuma releases straightforward bullet formations consisting of large, bubble-like projectiles interleaved with smaller bullets, which effectively obscure her physical body. Official reference material later designated her power as the ability to find the target book in an instant, enabling her to pinpoint the location of any specific tome by listening to the faint whispers emitted by books.

Background

During the events of Touhou Koumakyou, Koakuma confronted the protagonists inside the Scarlet Devil Mansion's library. As a generic lower-class demon capable of being summoned in groups from places like Makai, she was introduced without a detailed personal backstory. Official derivative works later depicted her in various everyday roles, such as a photograph in Touhou Bougetsushou showing her cooking at a food stall located by the library's pool.

Relationships

Koakuma is closely linked to the magician Patchouli Knowledge, who manages the Scarlet Devil Mansion's library. Both official materials and fan tradition portray her as Patchouli's dedicated library assistant and summoned familiar, tasked with organizing books and handling daily chores around the facility.

Trivia

Because Koakuma lacked full-sized portrait illustrations and dialogue in her debut game, her detailed visual features and personality traits were heavily shaped through community interpretations of her sprite. As her name translates to a common dictionary noun meaning little devil in Japanese, fan works use specialized tags like Koakuma (Touhou Project) or short nicknames to distinguish her from generic art.