Calaveras is a member of the Ayakashi Sisters and is very vain, argumentative, and arrogant.
Calaveras has light brown hair and light brown eyes. She wears her hair in a bun and with a big gold ribbon in it. Her outfit consists of a golden tube top, a red sailor-like collar, gold bracelets on her wrists, a red skirt, and golden boots.
Also, like the other members of the Black Moon Clan, she wears Black Crystal earrings.
Often Rubeus would send Calaveras on missions partnered with Petz. Individually she summoned the droid Jamanen, and together she and Petz summoned the droids Avogadora and Akumuda. After Koan was healed of her evil influence, Rubeus sent Petz and Calaveras to bring them back to Nemesis. Petz, whose evil was magnified by the power of a strobe Rubeus gave her, turned on Calaveras and attacked her out of jealousy. However, when Rubeus opened a vortex with the strobe, Calaveras saved Petz from getting pulled into the hole. After the Sailor Senshi combined their power and destroyed the strobe, Sailor Moon used Moon Crystal Power on Calaveras and Petz, and from here, they were cleansed of their evil and ran the cosmetic shop with Berthier and Kōan.
- Dark Beaut - A whip used by Calaveras to attack her enemies.
- Calaveras is forcibly changed back to her evil self by Apsu and is a boss fight in Sailor Moon RPG Another Story. However, she, like her sisters, seem to seem to still have control of their own minds, but their bodies are forced to fight the senshi. Also, the senshi are forced to kill them. It is unknown if she is revived in the end.
- Calaveras is the Ayakashi Sister counterpart of Sailor Venus.
- Calveras is named for the mineral calaverite, a gold telluride.
- In the DiC English Dub, Calaveras is renamed as Avary.