Arashi Narukami is a student at Yumenosaki Academy and a member of the idol unit Knights under the agency NEW DIMENSION. She identifies as a woman and embraces a self-proclaimed "big sister" persona, insisting on being called "Onee-chan" and preferring feminine nicknames such as "Arashi-chan," "Naru-chan," or "Ran-Ran" if addressed disrespectfully, using the feminine first-person pronoun "Atashi." Her career began as a child model, extending into high school, which forged early connections with Izumi Sena, Makoto Yuuki, and her admired former senior, Akiomi Kunugi, whom she holds a long-standing crush on. As a child, she displayed a rude and cheeky personality, often disrespectful to authority. Initially part of the inactive unit Backgammon (later Chess and Othello) in her first year at Yumenosaki, she joined Knights out of obligation to Izumi after its disbandment. During this transition, she dyed her hair brown and wore glasses to emulate Akiomi, exhibiting a tendency to slack off and skip classes for sweets. Arashi possesses messy blonde hair swept to the right, violet or light blue eyes (depictions vary), three ear piercings (two on the left, one on the right), and a metal ring on her right index finger. She stands 176 cm tall and weighs 59 kg. Her Knights stage costumes are elaborate, frequently incorporating navy blue, gold, and white with capes, epaulettes, and intricate details like golden ropes and fleur-de-lis symbols. She dislikes tight clothing but excels at sewing. Sociable, kind, and protective, Arashi acts as a caretaker, especially for those she finds cute or hardworking. She harbors a strong desire to create a world where everyone can shine and feel accepted. Internally conflicted, she often refuses help during stress and may push people away. She fiercely defends friends, sometimes threatening physical retaliation against detractors. Despite a generally mature demeanor, she exhibits a competitive and playful streak, particularly with Izumi. A core tenet of her identity is advocating for self-love, frequently declaring, "Above anyone else, I love myself," and encouraging others to embrace their worth. This philosophy stems from past mistreatment and familial neglect; her parents were disinterested and cold, leaving her largely unsupervised. She openly acknowledges struggles with gender identity, stating she may never become "the beautiful woman" of her dreams but resolves not to let this depress her. Early stories (2015–2017) portrayed her gender ambiguously, while narratives from 2018 onward explicitly address her gender struggles, solidifying her identity as a woman. Other characters use feminine terms for her, like Mitsuru's "onee-chan" and Tetora's "charming woman." Bisexual, Arashi expresses attraction to both men and women. Her romantic interests include the unrequited crush on Akiomi and Mika Kagehira, with whom she has discussed dating and exchanged declarations of love, once stating she would date Mika if they weren't friends. A significant, unnamed person she considered "the most beautiful in the world" confessed to her during the War Era but later died by suicide, leaving a lasting impact. Arashi practices voice training to switch between masculine and feminine vocal ranges for professional flexibility. She enjoys shopping, collecting point cards, and prizes. She owns a cat named Nyanko and adores felines. Her birthday is March 3rd, coinciding with Japan's Girls' Day. She maintains self-discipline, like limiting cake consumption due to calorie concerns despite a sweet tooth. Within Knights, she contributes a bright, tender singing voice and refined performances. She aims to make audiences smile through her idol work and aspires to create her own fashion brand. Her journey involves reconciling her desire for authentic recognition, moving from trying to fulfill external expectations in her second year toward asserting her true self.