From The TimeSplitters Wiki

Princess
Unlocked by	N/A
Species	Zombie?
Size	Large
Accuracy	N/A
Agility	N/A
Stamina	N/A
Fire Proof	N/A
Shock Proof	N/A
Default AI	N/A
Native TimeZone	1994
First Appearance	TSFP Story Mode
Relations	N/A
Games	TSFP

Princess is a boss character in the 1994 levels in TimeSplitters: Future Perfect. She is a large zombie-like creature with an eye in her stomach. Due to her huge size, Princess is not a playable character. Some think she could have been shrunken down to be made playable, similarly to how the The Cropolite was in TimeSplitters 2.

Strategy

Cortez faces off against Princess twice in the 1994 levels. In The Mansion Of Madness, Princess uses fire-breathing attacks. Her weakest spot is the eye in her stomach. Wait for her to open it before firing at it, however, because shooting at the closed eye does very little damage. When her eye is not open, shoot at her head. The Shotgun is the preferred weapon here.

You face off against Princess again in What Lies Below. This time around, Jo-Beth Casey is in danger, and you only have about a minute to finish the job before she dies. This time, Princess' weak spot is the canister in her mouth. Use the Harpoon Gun to shoot at the canister when her mouth is opened.