Arashi Hashiba is a supporting character in the anime High Score. He is a high school student who has achieved recognition as a professional gamer, earning the nickname the Demon King for his prowess. His skills are particularly notable in the popular online game Dragon World, where he is considered one of the most talented players.

In terms of personality, Arashi is characterized by a cool and aloof demeanor. He is a self-proclaimed solo player who prefers to rely on his own abilities and generally dislikes cooperating with others to reach his goals. Despite this distant exterior, he is a deeply competitive and determined individual. His passion for gaming has been present since childhood, and he possesses extensive knowledge of the virtual world. Arashi is highly analytical, with a sharp eye for identifying weaknesses in an opponent's strategy and the ability to devise quick solutions to complex problems. While he often appears cold, he has a softer side and is willing to help his friends when they are in need.

Arashi's primary motivation is to become the best player in the world and to leave a lasting mark on the history of gaming. His role in the story centers on defending his title as the Demon King, as his skills are constantly put to the test by other professional gamers who challenge him in hopes of dethroning him. Information regarding his specific key relationships and his character development throughout the series is limited, though he is noted to have a loyal and caring nature towards those close to him. His notable abilities include his exceptional strategic mind, his mastery of Dragon World, and his capacity for analytical thinking under pressure, which make him a formidable opponent in virtual competitions.