Mei Menowa is a supporting character from the anime and manga series Witch Craft Works. She is a Tower Witch who appears as a member of a group of five witches that transfer into the main character Honoka Takamiya's class. This group is known as the KMM gang or the Ivory Quintet, and within this faction, Mei acts as a prominent member, possibly second in command.

In terms of appearance, Mei is a young woman with mint-green, wavy hair that falls to her chest and is often styled with splits on either side. She has red eyes, though one of them is almost always covered by a metallic eyepatch over her right eye. Her constant companion is a small canine pet, which she wears around her neck like a shawl or scarf; notably, this animal also wears its own matching eyepatch. Her school attire is the standard uniform of her new school.

Mei’s personality is marked by a striking and intimidating confidence, which sets her apart from her comrades. She is bold enough to show overconfidence, even when confronting powerful adversaries like the main protagonist Ayaka Kagari. This confidence can veer into ruthlessness, as she has shown a willingness to take hostages and threaten them to achieve her goals. However, her character is not without a softer side; she occasionally reveals a more feminine or jealous personality, particularly in moments when she observes Ayaka's affectionate interactions with Honoka. In such instances, she has expressed a desire to receive similar attention, showing that her motivations are not purely villainous.

Her primary role in the story is as an antagonist, though one of a lower scale compared to the series' main threats. She and her four companions are assigned to capture Honoka, who possesses a special power within him. This mission puts her into direct conflict with Ayaka Kagari, who is sworn to protect him. During one of her early confrontations, she manages to kidnap Honoka and threatens to harm him, only to be shocked when the injury she inflicts appears on Ayaka instead, revealing the magical bond between the two protagonists. Her repeated attempts to attack the pair are consistently thwarted, often with little effort from Ayaka, which underscores her role as a recurring but manageable obstacle.

Key relationships for Mei include her bond with her animal familiar, which she uses both as a fashion accessory and as a tool for intimidation and combat. She also has a close relationship with her fellow Tower Witch, Kuraishi Tanpopo, with whom she is said to be particularly intimate and to share a stronger connection than with the other members of their group. Her dynamic with her primary targets, Honoka and Ayaka, is predominantly adversarial, though her interactions with Ayaka are laced with a strange mix of fear, rivalry, and envy.

In terms of character development, Mei remains a consistent supporting antagonist. She does not undergo a dramatic transformation but serves as a persistent presence that tests the heroes and provides insight into the world of Tower Witches. Her experiences being easily defeated by Ayaka do little to dampen her confident demeanor, marking her as a persistent if not particularly threatening foe.

Notable abilities possessed by Mei revolve around the manipulation of a black, fluid-like substance. This power allows her to control solid objects, create defensive barriers, and teleport by moving through walls. She is also capable of using her canine familiar as an extra appendage or weapon in combat. These skills make her a versatile fighter, but her power level is portrayed as average, being insufficient to stand against the series' stronger witches.