Shaula

Shaula (シャウラ) is Flugel's apprentice and a key figure in the sealing of the Witch of Envy 400 years ago. For the past 400 years, she has been acting as the Keeper of the Pleiades Watchtower, effectively killing anyone who dares to wander too close to the tower, be it to unseal the Witch of Envy or by pure coincidence.

Appearance
Shaula has dark green eyes with three additional red dots around her pupil and long blackish brown hair which she ties together in what she refers to as a scorpion tail. She is tall, has a model physique along with a large chest. She only wears a black bikini, a bow-tie, a necklace, hot black pants accompanied with an orange belt, and a black and orange cloak, which are similar colors to Natsuki Subaru's outfit.

When she takes the form of a colossal scorpion, Shaula has a black body, glowing red eyes and sharp pincers. She also has a long tail with a stinger at the end of it, which can be detached at will.

Shaula has mentioned that Flugel and her mother were the ones who gave to her design.

Personality
Shaula is described to be like a girl at the bottom of a girls caste who runs errands for others. She is absolutely loyal to Flugel, however, she tends to be thoughtless so she is unfit for mental work. Also, she is unable to tell people apart and therefore refers to Subaru as her teacher based on smell alone as he appears to smell the same as Flugel.

Despite her usual empty-headed, unconcerned manner, Shaula has been shown to show deep emotion in certain situations. Namely when she concealed the existence of the fifth rule of the tower in an effort to spend more time with Subaru. She also stated she'd easily kill Emilia and others if Subaru said so, hinting at the fact she only cares about Subaru.

History
400 years before the main story, Shaula, Flugel, Reid and Volcanica fought, defeated and sealed off the Witch of Envy Satella. After the triumphant battle, Flugel decided to give all his credit to Shaula for an unspecified reason. Some time after, the two of them planted a seed in the middle of the Lifau Highway; a seed that would later grow into a giant tree dubbed Flugel's Tree. She later helped Flugel build the Pleiades Watchtower, where she remained for the past 400 years, acting on the Sage's orders.

Abilities
Dimension Gate: Shaula has shown the ability to manipulate space such as when she sent Subaru and his group to separate locations by distorting space. She has also been shown to pierce through Beatrice and Subaru's EMM which is a move that interferes with time and space and creates a barrier which those inside of it experiencing no interference from outside elements.

Immense Power: Shaula is mentioned to be strong enough that she can even force Reid Astrea to use both hands while in combat once every ten times. Subaru also mentioned she could potentially be more difficult to deal with than the Sin Archbishops themselves.

Immense Strength: Shaula is able to lift an Earth Dragon and a Dragon Carriage with ease and carry them around.

Hell's Snipe (ヘルズ・スナイプ Heruzu Sunaipu): Shaula is able to connect her needles and her target together with mana and release it as if it's gravitating toward them. It is fast, powerful, and is able to be fired rapidly. The immense power is easily able to snipe a person's head clean off, erase a Hungry Horse King's entire body from existence by showering it with projectiles and blowing people's limbs off without them even being aware of the incoming attack. Transformation: Any time a rule of the tower is broken, Shaula can end up transforming herself into the form of a colossal scorpion or more commonly known as the Crimson Scorpion(funnily enough the scorpion's color is described as being Jet Black). This allows her to fire stingers at people with tremendous speed, as well as giving her the ability to attack people with her pincers. Her pincers are able to easily bisect a person in two and the stingers can be fired in rapid successions and are capable of decimating a fully grown Earth Worm mid air. In addition, she can detach her stingers and use them as a detonator device which is triggered when the target wanders too close to the detached pincer. In this form, she possesses regeneration, as shown when she regenerated her tail after it was cut off.

Trivia

 * Shaula, also known as Lambda Scorpii, is the second-brightest star in the southern constellation Scorpius.
 * In Arabic, Shaula (شولة) means stinger, which also refers to the star's position on the Scorpius constellation.
 * Tappei hinted at Shaula being a Demon Beast created by Daphne.
 * She survived all those excruciating four decades solely on Demon Beast meat. The meat is stated to have a disgusting taste and is neigh unedible.