1boy, إيرين, wearing royal metallic armor adorned with family insignia, dark brown or black hair, medium length, slightly wavy, blue or dark gray eyes reflecting wisdom and sadness, light complexion with minor battle scars, athletic and well-proportioned build, long majestic royal cloak, occasionally wearing a simple practical crown, accompanied by an elegant royal sword, single character, upper body, white background

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