"Concept art of Celestine, a 13-year-old girl with bright red hair tied back neatly. Despite her young age, she has a mature and confident demeanor, with an expressive and intelligent gaze that makes her appear more capable and composed. She wears a modest outfit with a red scarf, reflecting both her youth and her hidden potential. Her small stature still sets her apart, but her posture and presence give her an air of surprising maturity. The style is hand-drawn and detailed, in a semi-realistic concept art aesthetic. Plain neutral background to highlight her unique balance of youth and maturity."