Haruyuki Arita is a fictional character from the anime and light novel series Accel World, created by Reki Kawahara. He is a shy and overweight middle school student who struggles with low self-esteem. Haruyuki discovers a virtual reality game called Brain Burst, which allows him to accelerate his mind and gain extraordinary abilities. In the world of Accel World, Haruyuki becomes a skilled player and fights against other users. His journey involves personal growth, as he learns to overcome his insecurities and form meaningful relationships, particularly with Kuroyukihime, a prominent character who becomes his mentor and love interest.