Lambda

Lambda (ラムダ) (Λάμβδα) is a member of Shadow Garden, being one of the "Named Numbers" and the organization's drill instructor in charge of training recruits. Before joining the organization, she was part of the Velgalta Empire military until she contracted Demon Possession and was subsequently rescued by the "Seven Shadows".

Appearance
Lambda is a Dark Elf with platinum hair, sharp golden eyes, beautifully plump lips, with a tall stature and refined muscles from years of military training.

She wears a Slime Bodysuit molded into a military dress uniform with a V collar descended to her bust line attached to gold colored shoulder straps, with a gold trimmed choker on her throat. Her sleeves given a baggy design from the shoulders to the wrists, a single belt around the waist with an extra loop crossing around the ribs, and a dress with no ornamentation from her waist to her calves with a split in the dress, just above one leg, with partial splits at each quadrant of the dress. Her trousers are a simple black design with gold trims, leading to collared high heel boots with gold edges.

Her look is accompanied by an officer's cap and jacket draped on her shoulders, the style of which she is accustomed to having served in the Velgalta Empire's military. Often times, she'll have her left eye open and routinely analyzes whoever crosses her vision, such as Rose Oriana when she joined Shadow Garden.

Personality
Formerly being a military officer in the Velgalta Empire, Lambda is a strict instructor and harsh towards trainees, given her background and to ensure they're up to whatever tasks soon follow. Such as Rose Oriana, 665, and 664. She doesn't even hesitate to reproach and rebuke, if her orders are not obeyed by new members and she also strictly destroys or tears any objects or valuables from new members.

Whenever someone joins Shadow Garden's ranks, Lambda will not inquire into their past, as all numbers are just that, with who they were originally being knowledge privy to the executive officers, like Alpha, Beta, Gamma, and Epsilon, since that was the order given in part to avoid continuing to suffer from their hard past that they had, because of the Cult. Although some members, especially the newly new ones, it is not easy for them to discard everything. As a member of the Shadow Garden, she is very obedient towards her superiors.

Even though Lambda is feared by the other members because of her harsh teaching style, she is kind enough to acknowledge when any members perform well. Lambda may have unconsciously allowed her personal feelings to influence her into forcing her actions as she sees fit her desire, in order to prevent her subordinates from suffering the similar fate like her in the past.

Powers & Abilities
Before joining Shadow Garden, Lambda was once part of the Velgalta Empire as a military warrior where she had been trained to use and control her magic, as well as mastering military fighting skills that makes a testament to her prowess and ability, which she becomes one of the double-digit Numbers ranks and given a Greek name. Using her military experience, Lambda served as a Training Instructor to oversees training the subordinate Numbers in Alexandria so that their strength surpasses any nation's military in the world, including the Cult of Diablos.

Expert Combat Instructor
Like the other Named Numbers in Shadow Garden, Lambda is a master fighter by incorporating her military experience with her training under the Seven Shadows.

As such, Lambda trained each member of the Numbers to ensure they had the skills in the training they underwent to survive their missions of investigating the Cult by being able to alleviate and overcome their fears even a little through harsh training, which could give them the measure of strength to survive on the battlefield.

With Lambda's intensive training method in practicing magic and swordsmanship, the strength of each Numbers member was approximately as strong at the first-rate dark knight standard, exceeding that of the Knight Order and being able to take on the Cult of Diablos's army.

Military Intelligence
Lambda is familiar with the climate and situation of each country from her knowledge when she was working as an intelligence agent and sometimes consults with Alpha as a military advisor.

Lambda also created a structured plan that proposed forming a team of 3 Numbers members to strengthen their collaboration.

Sword Instructor
In the game, she uses a whip.

Trivia

 * Lambda is the first Named Number in Shadow Garden to be a Dark Elf and the second is Omega, who is a dark half elf.
 * Lambda's first animated debut was in the Master of Garden game, before she debuted in the anime by the season finale, Episode 20.
 * Within the game, Lambda is over 20 years old, being the oldest so far known in Shadow Garden.
 * It is unclear if Lambda is older or younger than Chi, as both are 23 years old.
 * For unknown reasons, Lambda keeps her right eye closed at all times, both in the Game and Anime, although she is not blind in one eye.
 * It is speculated that the Seven Shadows suspect or already know why Lambda keeps her right eye closed, but according to the game, like Kai, Lambda has an injured right eye. Although with the difference that Lambda does not wear a patch, apparently since a long time ago. This is said to her lord Cid, as seen from the game when she asks him, while they had some kind of date or conversation alone.
 * According to speculation, before she was captured by the Cult of Diablos. In response to it, Lambda developed highly sharpened and trained senses of balance, to compensate for the other failed half of her vision.
 * In Episode 22, Lambda has er right eye open in the dissolving animation for the ending credits. While open, her right eye has a magic seal in a pattern reminiscent of the Tri-Force, with a glowing core where her pupil should be. Likely an indicator to a secret ability, possibly a trump card power yet to be disclosed.
 * The appearances and interactions of Lambda, Kai, and Omega are constructs made for the anime, as none of them have made an official debut in the manga and have limited story in the web novels.
 * Lambda is officially a canon character from both Web and Light Novel from the beginning, while Kai and Omega are the Web Novel character before being adapt into the anime.
 * Despite Lambda's militant attitude and being someone well feared by the lower ranks, as well as several members who share her demeanor, like 559 and Eta, Lambda has a bit of a nurturing side that she doesn't show to anyone in general. The exception is Shadow, since her feelings are awakened for him.
 * In the Game, Lambda is seen, a little nervous and affectionate when she is with Shadow, although she tries to maintain the same attitude that she always maintains as a Shadow Garden instructor.
 * Lambda curiously, makes a military salute, equal to the soldiers of Earth. It is unclear if she copied it from Shadow or if Velgalta Empire soldiers also salute thusly.
 * In the Game, Lambda is the first-person Epsilon has cured herself.