suffix
player (of a stringed or keyboard instrument)
Attaches to instrument names to form agent nouns; used for instruments that are played by plucking, strumming, or pressing keys, such as ピアノ, ギター, 琴. Not used for wind or percussion instruments.
彼はプロのピアノ弾きです。
He is a professional piano player.
ギター弾きとして有名になった。
He became famous as a guitar player.