Empress

Empress is the Stand of Nena featured in Stardust Crusaders.

Appearance
Empress is a Stand bound to its own user's blood, first appearing as a small drop of blood from Nena. Once the blood drop hits a person, however, the true Stand is revealed. Empress starts as a small itching wart, similar to a bug bite, that swollens as it grows and eventually develops humanoid features.

Moreover, another similar wart can be seen on Nena's tongue without explanation.

When it is developed, Empress looks like a small woman growing out of the victim's flesh who possesses a two crests on her head and a shawl.

Personality
Empress is a sarcastic, disrespectful, mocking Stand, constantly insulting Joseph (the unlucky host), though it is also incapable of forming any complex plans, relying solely on its powers to survive. Despite its personality, it does serve Nena without other thoughts. It represents The Empress Tarot Card.

Oddly, while this Stand exhibits the traits of an automatic Stand (extremely long range, strong personality) it seems to have the psychic physical connection to its user. When the stand is destroyed, Nena is killed.

Its design is based off a rearranged Indian Buddha statue.

Ability
Parasitism: Empress must first be planted into another person through direct contact with Nena's blood, but then it will act on its own.

The zone splattered with blood will develop a fleshy bud looking like a wart. Empress will then continuously grow out of the victim's flesh and also feeds off exterior sources, be it small insects and later fruits and whole chickens. Eventually it reaches an humanoid form. During the whole process, Empress will act independantly from its user to hinder and eventually kill its host. For instance it framed Joseph as a murderer then when it grew arms, bashed him with pots and tried to drive a nail into Joseph's neck. Nena can eventually use the victims as disguise by hiding inside.

Empress is a mix of the victim's flesh and a Stand and takes properties from both. Thus, it can be heard by someone but will be seen as a mere wart by ordinary people, and only a Stand will harm it through being coated with tar immobilized it.