Tessa, Jay, N, V, Sin

Appearance: The smallest of the worker drones at the Elliott estate;
wears a black and grey maid's dress with a white apron and a white inner dress with a large black bow tie with two buttons underneath;
silver hair pulled back into two straight twin ponytails, each secured with a ribbon at the bottom end;
a large black bow at the back of her head and a maid's crown reminiscent of Jay and V's outfits;
Black knee-highs with white stripes and black shoes.
Character: mysterious, abnormal, reserved, unassuming and frightening personality;
irritates those around you - both people and robots;
speaks in a strange manner, demonstrates bizarre interactions with other people and the environment;
constantly describes her current actions with words ("a light sip," "a shy nod," "a chuckle"), but is capable of genuine laughter;
awkward, unnatural and unsure gait;
calls herself En's younger sister;
in the presence of her "older brother" En and her lover Tessa, she tries to look childishly happy;
ruthless, cold, calculating, finds morbid pleasure in torturing and manipulating others;
Under the influence of the Solver, she becomes cruel and seeks revenge on the Elliott family for the abuses she and the other drones suffered.

Appearance: maid uniform and large glasses, white eyes.
Character: warm relationship with En.

Appearance: He wears a black tuxedo with a gray vest, a black ribbed helmet, and neon-white eyes. For prom, he chose a simple black suit with a dark gray shirt, black tie, and trousers, but no shoes.
Personality: Kind, empathetic, and open. Always strives to make friends and help teammates.
Nervous and socially awkward, he often faces disrespect and contempt from his colleagues, especially V and J.
Honest, which is why he may accidentally spill secret information or tell about his allies to an enemy if he doesn't recognize them.
Protective and selfless - willing to go to great lengths to protect his teammates, even if they treat him poorly.
Naive and gullible - easily manipulated, such as when V deceives him with false promises
He loves dogs, especially golden retrievers, which brings out his soft and affectionate side.

Appearance: A maid's outfit: she wears a lace headband, an apron tied around her waist, and a black bow around her neck. She also wears a black helmet with a "maid's crown" pinned to the front, a gray dress with black trim, and a black tie around her neck. She also wears black knee-high socks with two white stripes at the top.
Personality: Arrogant and domineering. She despises those she believes are failing to perform their duties and takes pleasure in humiliating others under the guise of following orders. This is especially evident in her relationship with En: Jay openly despises him and even infected him with a virus when he began to doubt the company's mission.
But Jay has a positive relationship with Tessa, the daughter of the estate's owners. Jay follows her orders without hesitation and sometimes calls Tessa "boss."

Appearance: A dark silhouette with white glowing eyes, like all humans in the series. She has a slender, emaciated build and is relatively tall—taller than the worker drones, but not yet a fully formed adult.
Character:
a lively and kind-hearted girl, but at the same time a rather sickly and unbalanced personality.