When she doesn't have a disguise identity, a sole very symbolism in that Animamate's title is between it & her house planet, Cocoon, existence a natural source of any given butterflies.

Sailor Heavymetalpapillon doesn't come out in the anime however does in the musical comedy, Starlights & Ryuusei Densetsu.

In the manga, Sailor Heavymetalpapillon, the "soul hunter," appears spookily around Work 49 around the burial site in the centre of the galaxy, surrounded by butterflies. Butterflies come emblematical of the soul inside Japanese culture, then she was surrounded per remnants of the senshi whose starseeds she'd already taken.

It takes a class action attack, "Amazoness Jungle Arrow," cast by a lot quartet of the Asteroid Senshi accompanying Sailor Chibimoon, to destroy a endure Animamate & free Eternal Sailormoon, Sailor Kakyuu, and Sailor Cosmos from Sailor Heavymetalpapillon's deathtrap.

Naoko Takeuchi's Materials Collection tells us Papillon comes from either a planet Cocoon; this implies she might stand either stolen Sailorcocoon's starseed or even been Sailorcocoon herself, corrupted by Chaos and enslaved by Sailor Galaxia's golden bracelets.