Character
Rex
Rex in The Eminence in Shadow (2022), played by Nobuhiko Okamoto.
Rex (レックス, Rekkusu) was a Named First Child of the Cult of Diablos, titled Game of Betrayal (叛逆（はんぎゃく）遊戯（ゆうぎ）, Hangyaku Yūgi). During the attack on Midgar Academy for Dark Knights, he was tasked by Sir Gaunt to retrieve the Eye of Avarice artifact control unit from Sherry but was thwarted and killed by Shadow.
Read more about Rex on The Eminence in Shadow Wiki at Fandom