Her original name was Prisca Benedict (プリスカ・ベネディクト) and she was born as one of the sons and daughters of the 76th Emperor of Vollachia, Drizen Vollachia.
Priscilla has blood red eyes with long orange hair that she keeps tied. She wears a red and black dress along with a red fan, red shoes, and red and black hair accessories. She is described to have the largest chest size out of all female characters and lets out charm similar to a poisonous flower. By the age of twelve, she was already able to captivate men with her beauty.
When she is inside her mansion, she wears a red outfit that highlights her body a bit. She has a small coat with a black bow in the center and has a black clip on her hair, in which she has a ponytail. She also wears a pair of black studs. She keeps her fan between her breasts.
Priscilla believes that "the world is made in her own favor", and true to her words, many incidents have brought her good fortune. Because of this, she has an extravagantly self-centered personality, and is prideful as she hasn't been humbled even once. She detests those who do not serve her or simply get in her way. Priscilla demonstrates security in her actions, in the end she always gets her way and gives orders to the weak. Nor is she afraid to fight, since she knows perfectly how to fight and defend herself, she was not even intimidated when it came to confronting a Sin Archbishop.
However, she is well known for being a woman who over the years ended up being a widow, as her husbands ultimately ended up dying. However, Priscilla does not seem to mind at all, and considers her last deceased husband Leip Barielle an old pervert, this at the same time implies that she does not like the people who want to take advantage of her, since apparently she only wants the people to contemplate her beauty.
According to Berstetz Fondalfon, those who can wield the Yang Sword of Vollachia, like Priscilla Barielle, are sacred children that have the necessary qualifications of becoming the emperor or empress of the Vollachia Empire.
Priscilla was born in the Vollachian Empire as the daughter of its then Emperor, Drizen Vollachia, as "Prisca Benedict". She grew up with Arrachia, who later became her sworn sword. Prisca took part in the Vollachian Empire's Emperor Selection Ceremony at the age of 12 after being deemed worthy by the Yang Sword. However, Arrachia ended up betraying her fearing she would be killed by Vincent and agreed to Vincent's deal which would involve setting up a plot to fake her death. The plot succeeded and Prisca Benedict was regarded as dead save only to a few in the know. As a result Vincent Vollachia won the ceremony and became the Emperor whilst Prisca took the name Priscilla assuming the life of one of her deceased body doubles.
A short time later, Priscilla married her first husband Jorah Pendleton until his untimely death. She eventually found herself sold to the Kingdom as an offering due to her tremendous beauty. But, each person she was sold to fell into ruin and met unnatural deaths.
Divine Protection (加護 Kago): Priscilla has the Divine Protection of the Sun (太陽の加護 Taiyō no Kago), which makes her stronger during the day and increases the effects of buffs.
Yang Magic: Priscilla is able to use Yang Magic.
- Akra (アクラ): Priscilla produces pale colored light around the target that envelops them in a veil of golden light. The veil presumably allows the target to carry things with ease. This magic was cut from the light novel.
Sun Disk (日輪 Nichirin): During the Stars What Make History Arc, Priscilla showed to possess some kind of ability which she named the Sun Disk. It allowed her to remain uncontrolled by Sirius during the battle against Wrath. In addition to that, the ability was also capable of protecting other people, like Liliana Masquerade for example. It is unknown whether this is the power of being a powerful Yang Magic user, or another source of power.
Equipment: Priscilla is capable of using and creating the Yang Sword Vollachia (陽剣ヴォラキア Youken Vorakia), an ornate crimson sword from light that can shine like the sun. She mentions that it has a terrible mana consumption rate and therefore has it dissipate back into the atmosphere when she's not using it.
Three Jeweled Necklace: A mysterious object that Priscilla wears which has an effect that transfers any fatal damage done to her to it, subsequently breaking one of its gems. This means it can only absorb up to three attacks before its protection wears off.
Extraordinary Luck: Priscilla has a unique ability, which she mentions makes "the world in her own favor". Granting her extremely high luck in her daily life and in fights. She has also great intuition, which allowed to guess the right and safest path towards the lost Schult during their stay in Priestella. Also mentioning that it doesn't matter what choice she makes, she'll be always right and it will always be positive for her.
- According to the author, Priscilla's birthday is September 7 and is scheduled to be featured in Arc 7.
- Priscilla likes most animals, but if she had to choose her favorite, it would be a white wolf.