Beretta

Beretta (ベレッタ) is the bodyguard of Ramiris.

They were originally a Greater Demon who was summoned to fulfill a contract of inhabiting a Golem created by Rimuru to be the guardian of Ramiris' Labyrinth for 100 years. As soon as they possessed the Golem and was named, it evolved into an Arch Doll.

Later on, under the agreement of all parties involved, the original contract was annulled and Beretta permanently became Ramiris' subordinate as her aide and Rimuru acted as a kind of 'secondary master' as the original contractor and creator of their physical body, meaning it was still possible for it to receive power from Rimuru through the soul corridor and evolve.

Appearance
When summoned by Rimuru, Beretta was a Greater Demon, much more muscular compared to a Lesser Demon. On both side of it's head horns protruding. With black skin, dressed in expensive clothes.

A doll necessarily uses spherical joints. But surprisingly, the golem came out just as Rimuru had imagined it. In order to move the golem all that is needed is to direct magical energy into the joints. Rimuru made the face look beautiful and gave it a mask similar in design to his own. the golem was as large as a human, 180cm tall to be precise.

After receiving the name Beretta, it began to evolve. they first formed into a circle, but then chest, head, hips, arms, and legs formed, along with a face. The face was now hidden behind a mask and, instead of the black skin, long black hair now adorned it's body, skin pale, and bloodless. The eye slits on the mask glowed crimson.

Background
They were summoned to inhabit a golem created by Rimuru to protect Ramiris and the Labyrinth. The length of the contract is a hundred years. The payment for the contract was Rimuru's magical energy, which was already received from the summoning. Afterward, they could keep the body or throw it away. They requested that after it has protected Ramiris for a hundred years, that they be allowed to serve under Rimuru. And If he only promised it this, it would never bother him with another payment.

Later Guy Crimson convinced them (with a bit of a threat included) that serving two masters at the same time is a bad idea and that it should rather choose one true master to serve. Beretta agreed to truly follow Ramiris from that point on, but ultimately Beretta had it's own idea on how to "implement" this. They led Ramiris into making the Jura Tempest Federation their new "headquarters." One thing led to another and in the end Ramiris recreated the Labyrinth space underneath the Tempest Collosseum, managed together by Ramiris and Rimuru, making Beretta's plans a success.

Personality
Beretta was originally a Greater Demon and while it's physical form is that of a magical doll, their personality and mindset have not seemed to change based on conversations between Beretta and others, and the fact that other characters like Treyni the dryad, who was placed into a wooden doll made from her true tree body, didn't change despite inhabiting a new form.

Being a Demon of the Black lineage, Beretta takes on many characteristics that match or are similar to his progenitor, Diablo, due to the fact that all Demons take on the basic personality traits of their respective progenitors. Like Diablo, Beretta holds a high level of etiquette and respect. They are rarely shown to be overtly distressed or emotional, instead carrying a relaxed air. Like Diablo this, however, masks a ruthless and cold nature which they expose to enemies in battle. In the midst of combat it's demeanor is calm even when they brutally dispatches their foes. When it slew another doll, Viola, who had been under the control of Clayman, they only showed a fleeting interest in learning its name after tearing out its core while remarking about how fun it will be to take and study Viola's weapon at it's leisure at a later time, making it clear that they felt nothing at her demise nor any hesitation to end her.

Befitting a quirky demon from the noir lineage, Beretta is overjoyed to research with Ramiris.

Trivia

 * They are the only known Demon to be named by Rimuru after a firearms brand rather than cars. According to Rimuru, he named them as such because "something about the golem's form reminded me of the beautiful lines of that famous family of firearms."
 * Incidentally, Chevrolet also produced a car model called Beretta from 1987 to 1996.
 * The author mentioned that he originally intended to name all golem-based demons after firearms and name homunculus-based demons after supercars. However, Beretta ended up being the only golem-based demon appearing in story.
 * It is implied in Episode 23: Saved Souls of the anime that Primordial Noir was supposed to answer Rimuru's summoning in the labyrinth instead of Beretta, but they had gotten ahead of him.
 * In the light novel, Diablo casually commented that he was so jealous of Beretta until he tried to dispose of them in secret, but was stopped by the simple phrase "This body was created by Lord Rimuru, damaging it would displease him." This infuriated Diablo, but he didn't pursue the matter further.
 * Beretta as a Demon is of the color black, making him one of Diablo's descendants. Much like Diablo, Beretta is whimsical and values things other than strength. All demons of a certain color take on the basic personality traits of their progenitor.

Gallery
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