She may have also faced Shiromori in her humanoid form at some point, but that is currently unknown. She has even fought with Mystery directly in a fierce battle from what has been shown in the illustrations in 'Hellbent'. Mushi is a swords-woman from ancient Japan who has had direct encounters with Mystery in his kitsune form and Shiromori in her forest form from the distant past. In the latest music video ' The Future', she appears more friendly towards Vivi and goes out of her way to help her fight Shiromori through some type of spiritual ice power/connection with the ofuda talisman on Vivi's bat. She is bold and confrontational towards a very powerful looking Mystery in kitsune form from the illustration images in 'Hellbent'. Mushi seems to have a rather stoic presence, but will aggressively defend those she feels the need to protect. It glows of an otherworldly blue essence that might be connected to Vivi's bat that also glows the same color in 'Hellbent', presumably due to a mysterious rectangular Japanese sticker/charm that can be seen wrapped around the bat. This sword has very strong ice themes with the guard being snowflake-shaped and snowflake patterns appearing on the blade itself.

Mushi carries a blue katana with tassels on the pommel and gold diamond patterns (tsuka-ito) on the handle. Her physical appearance is eerily similar to Vivi, though she has noticeable differences in hair shape, clothing, and a more serious and battle hardy demeanor in her expressions. She wears purple-ish leather fingerless bracer gloves up to her elbows and wrappings from her knees down to right before her toes, being shoeless. She wears a long blue scarf, a light blue gi of some kind, and a darker blue mesh shirt and pants underneath. She has a scar on her cheek under her left eye, as well as another on her upper left arm. Mushi has a petite yet athletic body, sky blue hair with bangs, and a long raised ponytail.

Mystery skulls music