In the original Bloody Roar (1997) for PlayStation, Uriko (the Chimera) is not an unlockable character through normal gameplay . She serves exclusively as the unselectable final boss. While she became a standard playable character starting in Bloody Roar 2

You are now facing Uriko.

eventually becomes a series staple and a playable "Half-Beast" in sequels like Bloody Roar 2

If you are looking for the version where Uriko is a standard unlockable or playable character: Bloody Roar (part 10) | Uriko the Chimera

Warning: Because she is a "dummied out" playable character, the game may crash if both players attempt to use Uriko simultaneously. Additionally, her secondary color palettes are often unfinished or "glitchy". Character Profile: Uriko the Chimera

Unlike her later "Half-Beast" cat form, Uriko in the first game is a powerful, experimental Chimera known as Prototype Uranus.