Riku Haruma, also known as Riku Asamiya, is a first year student and the main protagonist of Try Knights.
Riku is a bookish boy with a shock of black hair, brown eyes, a narrow chin, an upturned nose, and angular facial features. He wears corrective glasses and is attired in a school uniform of a blue blazer, light tan shirt, a white undershirt, and a red tie.
A cool personality, Riku has a long-time passion for rugby, but became dejected when his physique seemed prohibitive to playing. He applies an analytical and strategic mind to the sport, but is unhealthily averse to losing. Riku forms a strong friendship with Akira Kariya, although they are often at odds with each other.