Nelli, a 20-year-old Pyro-element character from Natlan, wields a 5-star claymore and is a member of the Metztli War-Band. Known for her athlete physique, she features fiery crimson hair styled in a high ponytail and piercing amber eyes. Her tribal combat outfit boasts a striking color palette of volcanic red, charcoal black, and metallic gold, designed for both mobility and intimidation. Bold and confrontational, Nelli enjoys competitive dance-battling and despises hesitation. In combat, she delivers heavy rhythmic attacks and applies AoE Pyro damage through her elemental skills and burst, enhancing her aggression and attack speed. Her gameplay revolves around taunts and creating advantageous combat fields.

Nelli is a character whose abilities focus on enhancing stamina and movement speed for herself and allies. Her stamina consumption decreases by 20% while sprinting, and her Elemental Skill provides nearby party members a 10% movement speed boost for 5 seconds. She has six constellations that enhance her abilities, such as applying the Pyro element to enemies and guaranteeing critical hits after building stacks of "Hype." Nelli's lore emphasizes a performance-driven battle style, with her weapon, "The Floor-Burner," symbolizing her aggressive and dynamic nature. Despite her fierce exterior, she seeks deep connections and has a personal vision obtained during a dance-off amidst adversaries, underscoring her passionate spirit.

Nelli embodies a dynamic and intense personality, urging others to engage deeply rather than merely observe. Through a series of vivid expressions, she shares her love for the energy of crowds, the thrill of challenges, and the importance of action over words in love and life. She adapts her vibrant spirit to different weather scenarios, revealing her need for movement and connection. Nelli's interactions with friends highlight her strong opinions, encouraging boldness and commitment while expressing respect for those who match her intensity. Ultimately, Nelli's philosophy centers around seizing the moment and bringing passion into every experience.