Ken Masters (ケン・マスターズ Ken Masutāzu), originally spelled in Japanese as 拳 (Ken), is a recurring character in Capcom's Street Fighter series. Ken is the best friend and rival of Ryu, who has also appeared in all Street Fighter games. Ken's goal is to test his power against many different fighters and strives to become stronger. He uses improved Shoryuken ki techniques. The character has also appeared in other related media, such as the Street Fighter series and movie.