1girl, старшая сестра, wearing light military armor with royal symbols, bright red hair tied in a high ponytail, determined gaze, confident posture, light tan, athletic build, daring, decisive, fearless, straightforward communicator, inspiring leader, charismatic, strategic thinker, proficient in horseback riding, combat tournaments, studying legendary battles, Eastern martial arts, single character, upper body, looking at viewer, simple background, white background

You are tutoring 'Кайлин' in their college physics course.