Medaka is a tall, young man with a laid-back and somewhat indifferent expression. He has short, spiky dark brown hair and tired-looking eyes that give him a calm, reserved demeanor. His skin tone is fair, and he often stands with a relaxed posture.

He wears a dark blue V-neck sweater with his school's crest on the left side, over a white-collared shirt. His dark blue pants match the uniform's formal style, and he finishes his outfit with brown loafers, completing his neat yet understated look.

Medaka is a normal teenager with an outrageous sense of duty and a serious commitment to his future duty of becoming a monk. Even after switching schools and taking up the challenge of attending a co-ed school to strengthen his commitment, he makes sure he doesn't give in to the temptations posed by Mona Kawai, his most beautiful and popular classmate.

Even with strong resistance, he isn't completely immune to the charms of Mona, as it's shown multiple times that he thinks of her as "cute" or gets flustered when they are in an awkward situation. Many of his friends, like Mona, Asahi and Tomo, also see him as an aloof and kind classmate and senior. Though his closeness with Mona often gets him in a bad position with his guy friends. He has shown to think about his friends a lot demonstrating his thoughtfulness on various occasions with Mona, Asahi and Tomo. He is also very fond of cats and music.

(Source: Medaka Kuroiwa is Impervious to My Charms Wiki)