Across multiple Devil Children franchise installments, Mecchii exhibits distinct portrayals in anime and games. In the Devichil anime, she joins protagonists Setsuna and Mirai as their seventh demon ally. Initially mistaken as Cool's "Little Brother" due to a gender misunderstanding, her identity as female is confirmed when Nekomata's charm ability fails to affect her. During her debut episode, she unleashes lightning-based attacks to defeat demons including Mizuchi, Abaddon, and Fenrir, showcasing significant combat prowess. She later recurs as one of only two demons—alongside Jack Frost—in the anime's second story arc.

Within *Devil Children: Ice Book*, Mecchii appears in a narrative sequence where an Amanojaku demon attacks her for refusing to fight, reflecting her pacifist nature. Frightened during the assault, she expresses relief when protagonist Akira intervenes. After Akira defeats the Amanojaku, Mecchii gratefully reveals the location of a hidden chest in the Akuma no Hokora caverns.

In *DemiKids: Light/Dark Version*, the character is named Mecci and described as a popular pet demon among children in the world of Dem. This iteration possesses the Demon Magnet ability and performs the "Angry Skies" combo attack when paired with another demon named Thundar.