art by  Caste

Mikamute! Nearly identical to Mute, but maintains her eye color and need for glasses through forms. Mika switches to this form in proximity of -any- magical fire, due to the corset imprinting kitsune essence into her. Mute made Mika a magical lighter that allows her to activate this form intentionally, otherwise just any exposure to nearby fire magic will activate the transformation outside of Mika's will.

Mika has to be in this form to use magic, but the latent energy in the form makes technology not tempered to magic go haywire; part of Mika's research after this transformation is trying to develop technology that can work with and feed off of magic.

Mika travels with Mute in this form, generally, to prevent awkward transformations if the two are exposed to pyromancy in public (and Mute has probably set off the transformation herself a few times)