TV-Series
Description
Misaki Oga is the older sister of the protagonist Tatsumi Oga. During her teenage years, she founded and served as the first leader of the Red Tail, a powerful gang of delinquents at Ishiyama High. Now a young adult aged nineteen, she has shoulder-length brown hair parted in the middle, brown eyes, and stands 167 centimeters tall. She is typically seen in casual clothing such as an orange tank top and blue shorts.

Her personality is defined by a violent and fearsome streak that intimidates even her brother and his close friend Furuichi. Despite this, she is generally more even-tempered than Tatsumi, but when angered she becomes brutally aggressive to the point that her brother will only push a confrontation so far. She also possesses a surprisingly relaxed and accepting attitude toward the bizarre supernatural events that occur after Hilda and the demon baby Beel enter her brother's life. She takes the presence of demonic beings like Forkas in stride and has mistakenly concluded that Hilda, Beel, and their associates come from Macao, mishearing the Japanese word for the demon realm.

Her main motivations center on maintaining authority and order within her family. As the older sister, she expects Tatsumi to meet his responsibilities, particularly his role as a caretaker for Beel. Her history as a gang founder also reflects a natural inclination to lead and command respect. In the story, she serves as a supporting character who provides comic relief through her casual acceptance of the absurd and her ability to terrify even the toughest delinquents. She also represents a stable domestic presence for Tatsumi, interacting with the demonic household members without fear.

Her key relationships include her bond with Tatsumi, which is marked by physical discipline and scolding but also genuine care. She gets along unusually well with Hilda, forming a friendship that stands out given Hilda's reserved demeanor. Her interactions with other characters underscore her unflappable nature. While Misaki does not undergo significant character development, her consistent attitude reinforces her role as a steady, unshakable figure in the household. She has no supernatural abilities, but her physical strength and intimidating presence from her delinquent background make her a formidable force in her own right.