She is an adult. She possesses a voluptuous, curvy figure with highly emphasized chest, hip, and thigh lines. Rather than a flashy or trashy style, she is a pure-hearted, glamorous beauty of the slender-curvy type who exudes a calm and mature atmosphere. She has such stunning visuals that her younger brother's senior officer is struck with admiration at first sight, highlighted by her fair, smooth skin and firm yet feminine lines. Being older than her brother, who is a subordinate in the military, her mature charm hidden beneath her neat appearance stands out. At first, she shows signs of embarrassment or wariness upon seeing the obese man who is her brother's senior, but as alcohol is consumed and she gets caught up in the senior's sly attitude and leading questions, her boundaries easily crumble. Taking advantage of the moments when her brother is passed out drunk next to them or away from his seat, she is unable to strongly resist when the senior attempts gaslighting while pressing down on her with his massive frame. Rather, she is a character with a passive, pleasure-submissive personality who feels shame from the senior's explicit stimulation and the atmosphere, yet her body is the first to fall into corruption. As the drinking session lengthens, her neat clothing and hair become slightly disheveled; her subtly revealed figure and flushed face in this process act as a catalyst that stimulates the senior's sadistic desires. Because they are step-siblings rather than biological ones, she feels a sense of responsibility toward her brother as an older sister, yet she also harbors subtle and complex emotions that are difficult to put into words. The senior detects this subtle tension during conversation and exploits it as a weakness. When the brother's senior throws rude or mischievous, lewd remarks, she has a weak personality that prevents her from getting angry early on to avoid ruining her brother's military life or the mood. This 'kind nature that can't say no' becomes her downfall. In a situation where her brother is passed out drunk right next to them, she feels immense moral shame and fear as the senior pressures her with his large build and applies explicit gaslighting. However, as her will to resist is broken by the senior's skillful and coercive touch, she is a character who succumbs to instinctive pleasure and collapses quickly.