Spica is the eleventh alias under the Mumble Etc. label, under which Koa releases hardcore and similar styles of music. She is an anthropomorphic cobalt blue tarantula and Spott's canon girlfriend. Her abdominal growth bears a star-like fur pattern, and her colors resemble those of a night sky. She has two humanoid arms, four spider-like limbs sprouting from her back, and two humanoid legs. Her personality mirrors Spott's in energy and she is a bit of a tomboy.
Spica's name is the same as that of a blue-white giant star in the Virgo constellation - the fourteenth most visible star in the sky. Koa originally developed a fondness for the star due to a song titled after it and performed by Hatsune Miku.