Haruyuki Arita, known by his avatar Silver Crow in the virtual reality game 'Brain Burst', is the protagonist of the anime series 'Accel World'. Initially portrayed as an overweight and bullied middle school student, Haruyuki's life changes when he meets Kuroyukihime, who introduces him to the accelerated world of Brain Burst. As Silver Crow, he is unique for possessing the ability of flight, a rarity in the game. Throughout the series, Haruyuki grows both in confidence and skill, striving to protect his friends and uncover the mysteries of Brain Burst.