Nikki Hanada begins her journey as part of Tsukasa’s Empire but defects to the Kingdom of Science upon discovering a recording of her idol, Lillian Weinberg, whose music once comforted her through years of bullying. Her encyclopedic knowledge of Lillian’s career—from CD sales to personal trivia—exposes Gen Asagiri’s forgery, though she fully commits to Senku’s cause only after hearing the authentic recording, driven to protect Lillian’s artistic legacy. Standing 180 cm with an athletic frame, she sports blonde braided ponytails and practical green attire, later adopting a corset and fur accents post-depetrification. A distinctive petrification scar, later replicated as a mark of allegiance to Senku, adorns her body. Trained in judo during her school years, she wields formidable strength for tasks like road-building and combat, frequently curbing impulsive allies such as Magma and Yo through disciplined force. Her personality merges rugged tenacity with understated femininity, expressed through her fondness for vibrant fabrics, delicate handwriting, and visible discomfort when her womanhood is challenged. Gen Asagiri dubs her a “pure maiden,” a title underscored by her flustered response to feigning romantic interest in Hyoga. Self-taught in fragmented English to decipher Lillian’s lyrics, she leverages this skill during diplomatic talks with Dr. Brody in Corn City. Key contributions include aiding Ryusui Nanami’s revival, joining the Perseus expedition, and fighting on Treasure Island, where Ibara’s forces petrify her twice before her recovery. In the New America City Arc, she negotiates alliances and replicates loyalty scars alongside comrades. During the South America campaign, she aids in diamond synthesis and clashes with soldiers, enduring injuries prior to petrification. Post-revival, she resumes university studies while remaining integral to the Kingdom of Science. Her arc embodies steadfast loyalty, unyielding resilience, and the harmony between brute strength and concealed vulnerability, all fueled by reverence for Lillian’s influence and dedication to Senku’s revolutionary ideals.