Nagisa Daimonji serves as the younger sister of Gouki Daimonji and leads Team Nagisa with Others. Her distinctive appearance merges pirate and country western styles, featuring a pink blouse, orange vest, lighter orange skirt, pink sash belt, pink hair bow, and pink cowgirl boots adorned with red diamonds. She sports dirty blonde hair in a ponytail and green eyes, with her Vanguard Circle manifesting in pink. Personality-wise, Nagisa is sweet, cheerful, and tenaciously attached to Kamui Katsuragi. She persistently declares her love despite his lack of reciprocal feelings, frequently fantasizing about marriage while overlooking his discomfort. This fixation leads her to propose marriage as a condition for their cardfights. During Season 1's regional tournament, she defeated Kamui using a Nova Grappler deck and appeared afterward in a wedding dress; Kamui deferred marriage by noting his team hadn't lost the overall match. Her pursuit continued in Season 2, where she arrived via a carriage orchestrated by her brother's teammates, again in a wedding dress. She battled Kamui with a Death Army deck but lost; he cited team obligations to delay marriage, though she vowed to wait. In Season 3, Nagisa appeared at Miyaji Academy's open house in a Reversed state, facing Ninja Master Neo with a Beast Deity deck. During the G series, she returned as an older character. In G Season 1, she visited Card Capital 2 during Kamui's absence and chased him to deliver a homemade lunch, manipulating Chrono Shindou into opposing Kamui through a sob story. She later fought Kamui under the marriage condition but lost. G Season 2 featured her as part of Team Handsome, losing to Chrono in the semi-finals of a tournament at the Magallanica Branch. In G Season 4, she formed Team Hell and Heaven with Kamui and Emi Sendou for the U20 tournament. During a match against Chrono, she aimed to free Kamui from the "Drop Zone" after his loss to Enishi. She achieved victory by checking five Critical Triggers: three after striding Sonne Blaukluger and two more when riding Vollmond Blaukluger over her Vanguard. Post-match, she revealed Ibuki convinced Kamui to join the U20 with her. Her name "Nagisa" (ナギサ) carries potential meanings depending on kanji, such as "beach/shore" (渚) or "calm" (凪) combined with suffixes like "sand" (沙) or "blossom" (咲). The surname "Daimonji" (大文字) translates to "uppercase letter" or "large characters," derived from the kanji for "big" (大), "sentence/writings" (文), and "character" (字).