L Nomura is one of the four main members of the idol group Marginal #4, produced under Pythagoras Production. He is the younger twin brother of R Nomura, having been born after R. Physically, L has bright, collar‑length green hair with two longer sections that reach his chin and fade into a blond‑white color, and his eyes are green with a cat‑slit shape. His appearance is described as showy and he possesses a natural idol aura that captivates those around him.

Personality‑wise, L is astute and ingenious, often displaying a clever and sharp‑witted nature. He enjoys shopping and has a particular fondness for eating sausages. A distinctive and well‑known trait is his deep obsession with marimo, a type of algae; he is sometimes nicknamed the Marimo Prince because he keeps a marimo on hand at all times and knows a great deal of trivia about them. This enthusiasm for marimo marks him as something of an otaku within the group.

As a member of Marginal #4, L's role is to contribute to the unit's goal of delivering their kisses to the end of the galaxy, striving to reach the top of the idol world alongside his twin brother R, Atom Kirihara, and Rui Aiba. His clever personality often provides a contrast to R's more sweet and innocent demeanor. Outside of idol work, L maintains a close sibling bond with R, and the two are frequently seen together. L's motivations are tied to the success of the group and his own growth as an idol, though his specific personal ambitions are not extensively detailed in the available material. His natural charisma and unique hobby give him a memorable presence within the ensemble, and his development is shaped by his interactions with his fellow group members and his twin brother.