Nemumu is a character who appears in the story of My Gift Lvl 9999 Unlimited Gacha, summoned into existence through the use of Light's Unlimited Gacha skill. She manifests as a UR card bearing the title Level 5000 Assassin Blade, meaning she is a high-level being created to serve her summoner with absolute loyalty. She is a beautiful young woman with striking, clean-cut silver hair that ends slightly above her shoulders and tan skin, and she almost always keeps the lower half of her face hidden behind a muffler, which adds to her mysterious and stealthy aura. Her role in the story is primarily that of a scout and a loyal bodyguard to Light. When operating on the surface, she works alongside Light and another summoned ally named Gold as part of the adventurer party Dark, where she acts as Light's personal bodyguard. She is the party's main scout and excels at all forms of stealth and covert action. As an Assassin Blade, she is a master of assassination, specializing in surprise attacks and ambushes, and she skillfully wields dual daggers in combat, overwhelming her foes with swift, deadly strikes. Nemumu is deeply loyal to Light, and her motivation is rooted in her purpose as a summoned card being: she was born to serve him as a powerful and faithful subordinate. Among Light's female companions, she is considered a member of a group fan-named the Ha-Ha Faction, which consists of characters who are all deeply infatuated with him. Because she frequently accompanies Light on small-group missions, her position is seen as a special perk among that group. In terms of her development, she remains a consistently dedicated and effective member of Light's forces, and there is a notable moment where she re-swears her loyalty to him, reaffirming her commitment. Her key relationships are primarily with Light, to whom she is bound by summoning and service, and with Gold, her fellow summoned ally with whom she works during surface operations. Her notable abilities include high-level stealth expertise, scouting, covert elimination of targets without being noticed, and dual-dagger combat that allows her to overwhelm opponents with speed and precision. She is a supporting character who contributes significantly to the tactical and combat strength of Light's group.