Beatrice

Beatrice (ベアトリス) is a member of the Emilia Camp and the former caretaker of the Forbidden Library at Roswaal's Mansion, until its destruction in the climax of Arc 4. She is one of the main supporting characters in Re:Zero, with an especially large role in Arc 4.

She is an artificial spirit created by the Witch of Greed for unknown reasons. 400 years ago, she was told to wait in the library for "That Person" who would grant her salvation. However, in Arc 4's climax, Subaru convinced her to live and she became his contracted spirit.

Appearance
On the outside, Beatrice seems like a lovely young girl around the age of eleven or twelve. Her face is so sweet that Subaru believed there was no heart that wouldn't melt at the sight of a genuine smile of hers. Her large sky-blue eyes have pink butterfly patterns as their irises that denote her relation to the Witch of Greed. Beatrice's pale cream blonde hair is worn long and tied into frilly vertical drill-shaped twin tails that act like springs when pulled on. In the anime adaptation, the tips of Betty's twin tails are dyed pink.

Most of the time, the Great Spirit of the Forbidden Library can be seen wearing a pink frilly ornate dress with white trimmings and an exposed front that leave her legs visible, and are completely covered by pink and purple vertically-striped tights. A petite crown is also sported on the right side of Beatrice's large head, serving as a nice accessory which complements her appearance rather perfectly. Beatrice also wears pink shoes with butterfly straps on her feet, and has a large pink ribbon adorned upon the left side of her waist and a pair of similar ribbons tied at the top of her twin tails.

Personality
Beatrice generally looks down on others and is bad at dealing with people who try to get close to her. Despite being full of bravado, she's a lonely person, and is softhearted beyond her perceived stubbornness. She is affectionate towards Puck because of their similarities and favors him over the others in the Roswaal household.

She has a distinct way of speaking, adding "I suppose" (かしら, kashira) and "in fact" (のよ, no yo) at the end of most of her sentences.

History
Beatrice is an Artificial Spirit created by The Witch of Greed Echidna over 400 years ago. In the years following her creation, Echidna tasked Beatrice to safekeep her mansion, known as the Palace of the Witch. Throughout the Witch's frequent absences, Beatrice acted in her place, helping out whoever managed to reach the unreachable Palace, together with Puck. Roughly three years after her creation, she and Puck helped Tosca in fending off the Silver Dragons led by Falgal.

Some years later, Beatrice started frequently accompanying Echidna to the Sanctuary, where she met the original Ryuzu Meyer and became friends with her. However, disaster struck when the Warlock of Melancholy Hector attacked the Sanctuary, as he was hunting down Echidna. To protect everyone in the Sanctuary, Ryuzu offered to use herself to speed up the process of putting up the Barrier around Sanctuary–Echidna's only plan of stopping Hector. Following the creation of the Barrier and the Sanctuary's survival, Echidna told Beatrice to use her Door Crossing to connect her library to Roswaal's mansion, as she wanted the knowledge she had collected to survive. Echidna told Beatrice to protect the library until "That Person" showed up to bring her out of the library.

Throughout the centuries many people tried to take her out of the library, but they were all interested in the knowledge in the Forbidden Library or using Beatrice as she is a very powerful great spirit. Beatrice began to close her heart, doubting that "That Person" would ever show up. A couple of months before Subaru's arrival, Emilia was brought to the mansion, and with her, Puck. Though Beatrice was rejoicing at first, she soon realized Puck has changed, as he spent every waking minute hovering around Emilia and not paying much attention to Beatrice, despite their nearly identical upbringings, all those centuries ago. Not long after, however, a strange boy by the name of Natsuki Subaru, had also arrived at the mansion.

Abilities
Magic User (魔法使い Maho Tsukai):

Decurseifcation: Beatrice, just like Puck, can sense when an individual has been infected by a curse. She can tell where on a person's body a curse has been placed and can subsequently remove it. However, Beatrice can only remove a curse if the caster has yet to activate the curse they had placed on a person. Furthermore, she can't tell the effects the curse would inflict on an individual without observing the curse in effect.

Mana Drain: Unlike most spirits, Beatrice does not absorb Mana from the atmosphere. Instead, Beatrice obtains her Mana from living creatures. By touching an individual, Beatrice can absorb the mana stored in their gate, bolstering her own supply of Mana in the process. The individual effected by the technique would become physically fatigued if enough of their Mana was drained. By absorbing a person's mana, Beatrice could also tell to an certain extent whether the target had hostile intentions towards her or not, She is the only one besides Puck that knows this skill, though Reinhard has shown a similar ability at the end of Arc 1.

Contract Spirit: Beatrice is currently contracted with Subaru, though according to her, he isn't a true Spirit User. She also has a terrible mana consumption rate and formerly got around this by draining mana from people in the mansion while using the library as a medium. As Subaru's contracted spirit, Beatrice is able to sense his condition and whereabouts via her connection with him, although Subaru is unable to do so. Furthermore, Beatrice can be summoned by Subaru if he focuses enough on his link with her. As she is an Artificial Spirit, she also has several conditions Subaru is forced to follow:
 * Subaru cannot form a contract with other Spirits.
 * Beatrice cannot restore mana on her own.
 * Beatrice cannot use the mana in the atmosphere.
 * Beatrice can only drain mana from Subaru.

Vast Intellect: Being over 400 years old, Beatrice has vast amounts of knowledge on a variety of subjects, and is always reading books in her library. Beatrice is also really excellent with magical power theories and using them. Her knowledge on Yin Magic far surpasses Roswaal's own.

Equipment
 * Book of Wisdom (叡智の書):Beatrice's_Gospel_ep.32.png 400 years ago, Echidna gave Beatrice one of the two imperfect replicas of her Book of Wisdom. The Book's design was similar but wider, taller and thicker than the defective Witch Cult's Gospel although this one was far more specific, when it came to guiding the owner towards their desired path, resembling Echidna's very own, perfect Book of Wisdom more than the aforementioned Witch Cult's Gospels. Soon after Beatrice received the Book and locked herself into the Forbidden Library, her Book suddenly stopped showing new content, leaving Beatrice in the dark for centuries. At last, Subaru saved Beatrice from the burning library, in which, her Book of Wisdom was completely lost.

Trivia

 * Beatrice shares the same attribute with Subaru, which is why they're highly compatible in terms of being a spirit and contractor.
 * The crown on Beatrice's head is actually a small detail added by the illustrator, and wasn't planned by the author.
 * The author has stated that her birthday is a spoiler.
 * Beatrice kept her Gospel hidden within the stepladder where she was normally seen sitting.
 * Just like Emilia and Echidna, Beatrice is tone deaf.
 * The author once mentioned that Beatrice has a small chance of beating Puck in a serious fight though Puck is the most likely victor.
 * Beatrice loves everything that tastes sweet.
 * In Arc 5, it is mentioned that Subaru has given Beatrice an allowance, though it isn't specified how much the allowance is.
 * She's one of the very few people in the Re:Zero world who can somewhat use Teleportation magic. Alongside her, Echidna and unnamed Witch Cult members, no one else holds the capabilities to display such type of magic.
 * The first living being Beatrice killed was a Silver Dragon, roughly three years after her creation/birth.
 * Beatrice is stated to be the last artificial spirit created by Echidna the witch, with Puck being the first and Echidna (Artificial spirit) being the second.
 * Beatrice stated that both her physique and clothing are molded with mana and that she has total freedom over changing clothes and refashioning.
 * Tappei stated that Echidna chose Beatrice's outfit, this being the reason she continues wearing the same clothing her mother likes ever since.
 * Even though they have no need to eat or drink, spirits like Beatrice and Puck can comprehend taste and any edibles ingested by them are converted into insignificant amounts of mana, hence they don't produce any body waste.

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Beatrice 碧翠丝