Yozora is a main character in the fictional game Verum Rex, which is featured prominently in parts of Kingdom Hearts III.
Story
Kingdom Hearts III
Yozora first appears in a trailer for Verum Rex which plays at the beginning of the Toy Box world. This advertisement is then shown to be on a television viewed by Rex and Hamm in Andy's room. After Sora, Donald, and Goofy, defeat a group of Heartless that appear in Andy's Room, Rex confused Sora for Yozora when thanking him.
Yozora and his teammates are featured prominently in marketing material for Verum Rex displayed in Galaxy Toys.
Other appearances
Yozora
Yozora also appears in the secret movie of Kingdom Hearts III, also called "Yozora". As Riku walks past a large building, Yozora sits on the edge of one of its towers and watches Riku unseen.
Design
Yozora's name is derived from the Japanese word for "Night Sky" (夜空 Yozora?).