Hikari Ogasawara serves as an artillery officer aboard the destroyer Harekaze, operating from the firing command post to aim the ship's main armament during combat. Her position demands precise calculations and rapid decisions under pressure, utilizing her strong physics and mathematics skills. She works alongside gunners Michiru Takeda and Junko Heki, often leading their team during tactical engagements. Physically, she stands 155 centimeters tall with blue eyes and brown or auburn hair styled in short twintails, typically wearing the standard Yokosuka Girls' Marine High School uniform. Her personality is proactive, energetic, and inquisitive. She maintains intense focus during gunnery operations but displays a sociable demeanor off-duty, frequently spending leisure time with fellow gunners. She avoids biology and language arts, favoring numerical subjects like physics for their application in ballistic calculations. Her motto, "Success on the first try," reflects her emphasis on precision. Her skills originated from childhood interests in aiming activities like darts, which evolved into exceptional naval gunnery accuracy. She practices tea ceremony, influenced by her aunt. Academically, she excels in physics but struggles with biology. Raised in Kofu, Yamanashi Prefecture, she studied her brother’s physics textbooks to understand projectile motion. She holds hazardous materials handling qualifications, indicating specialized safety training. During a critical battle against the Admiral Graf Spee, the Harekaze’s firing command post suffered direct hits from enemy shells. Despite severe damage and initial safety concerns, protective airbags ensured Hikari’s survival. She subsequently aided engineering personnel in ship repairs. Her preferences include favoring horse meat as a favorite food and disliking green peppers. Her hobbies remain darts and tea ceremony participation.