Terunosuke Miyamoto (宮本 輝之輔 Miyamoto Terunosuke), originally referred to as Enigma Boy (エニグマの少年 Eniguma no Shōnen), is a tertiary antagonist featured in the fourth part of the JoJo's Bizarre Adventure series, Diamond is Unbreakable, specifically in the "Enigma Boy" story arc. A Stand user given power by Yoshihiro Kira and prompted to ambush Josuke, Koichi, and Yuya. His Stand is the fear-reliant Enigma.