Rex is a young boy, age 15, with brown, short hair and brown eyes, and is 4 foot 11 inches tall. He is a bright and optimistic boy, an ENFJ. He inspires people with his charismatic, determined, and silly personality. He is the Driver of the legendary Blade, the Aegis. Rex is friends with some other Drivers, including Nia, Tora, Morag, and Zeke. He is also friends with some Blades, such as Dromarch, Poppi, Brighid, Pandoria, Pyra, Mythra, and Pneuma. He works as a salvager, who dives for metal.