also: コスプレーヤー
noun
cosplayer
A person who dresses up as a character from anime, manga, games, etc. Loanword from English 'cosplayer'.
See also: コスプレ
彼女は週末にコスプレイヤーとしてイベントに参加した。
She attended the event as a cosplayer on the weekend.
あのコスプレイヤー
That cosplayer's costume is very elaborate.