Yozora

"I've been having these weird thoughts lately. Like, is any of this for real or not?"

Yozora is a character in the Verum Rex video game series that exists within the world of Toy Box.

Physical Appearance
Yozora's appearance bears a great resemblance to Riku. He has silver hair in a similar style to Riku, and uniquely has two different eye colors as a result of heterochromia iridium; his right eye being a light blue color, and his left eye being a dark red color. His outfit also appears to be a slightly darker version of Riku's, a notable trait on his outfit being a shoulder emblem picturing a skull crescent accompanied by two Keyblades.

Kingdom Hearts III
Yozora is seen prominently in advertisements for Verum Rex, a video game featured in the world of Toy Box. Upon Sora, Donald, and Goofy's arrival to Toy Box in their toy forms, Sora is mistaken by Rex to be a toy modeled after Yozora.

In the eponymous secret movie, Yozora is seen sitting atop a skyscraper, watching the streets below.

Trivia

 * Yozora's name is derived from the Japanese words for "night sky" (夜空 Yozora).