Whitey (Shiro) is a baby dragon and a core member of his adventurer group. He possesses a rare white dragon jewel. The discovery of an identical jewel sparks their investigation into potential links to Shiro's lineage and the quest to locate his parents.

Shiro's origins and background receive deeper context in an OVA. As the group travels, hints emerge of Shiro's connection to ancient or mythical entities, particularly in expanded light novel material like "Shiro-chan to Inishie no Monster," which involves ancient monsters or relics tied to his existence.

Throughout the adventures, Shiro remains integral to the group's activities, participating in treasure hunts, riddle-solving, and explorations across diverse locations. His gender is consistently male.