From The TimeSplitters Wiki

The Master
Unlocked by	TS2: Honorary League > Team Series B > Rice Cracker Rush with Gold or Better TSFP: Amateur League > One Gun Fun > Divine Immolation with Bronze or Better"
Species	Human
Size	Normal
Accuracy	3
Agility	TS2:4 TSFP:5
Stamina	TS2:7 TSFP:5
Fire Proof	5
Shock Proof	5
Default AI	TS2: 1 TSFP: 5
Native TimeZone	2019
First Appearance	TS2 Story Mode
Relations	N/A
Games	TS2, TSFP

The Master is a mysterious travelling monk.

TS1 Gesture	N/A	TSFP Gesture	Stomps foward and says "Ha-ryu-ken!"
TS2 Gallery	A wandering Chinese monk, the Master's life is shrouded in mystery. Ladies can't resist stroking his beard.	TSFP Gallery	Nobody has managed to work out how he reconciles a philosophy of non-violence with carrying large automatic weapons but they're sure that he has a clever and well considered explanation.

2019 NeoTokyo

In TimeSplitters 2, NeoTokyo on Normal difficulty you can find the master at the very bottom level of the Hon Maru station. He will give you full health and armor and will say: "Do not be blinded by anger."

Arcade League

The Master also stars in various Arcade League challenges, these are Rice Cracker Rush, Golem Guru and Divine Immolation