Nina Kowalski is a supporting character in the anime Brave Bang Bravern!. She is a doctor serving in the United States Marines. According to available records, she is 26 years old, of American nationality, with auburn hair and blue eyes, standing 1.72 meters tall, and her birthday is May 12. In the series, she is identified by her long red hair and is frequently depicted wearing a lab coat, skirt, and tights, consistent with her role as a military medical professional. Her specific personality traits, motivations, key relationships, character development, and notable abilities beyond her occupation as a doctor are not elaborated in the searchable source material, which limits the depth of a comprehensive description to these basic biographical and professional details.