From The TimeSplitters Wiki

Reaper Splitter
Unlocked by	Space Station on Normal/Hard
Species	TimeSplitter
Size	Normal
Accuracy	9
Agility	4
Stamina	5
Fire Proof	N/A
Shock Proof	N/A
Default AI	5 stars
Native TimeZone	2401
First Appearance	TS2 Story Mode
Relations	Scourge Splitter, TimeSplitter, Berserker Splitter, TimeSplitter 1, TimeSplitter 2
Games	TS2

TS1 Gesture	N/A	TSFP Gesture	N/A
TS2 Gallery	Selectively bred for strength and ferocity. Reapers are the main combatants of the TimeSplitter army.	TSFP Gallery	N/A

The Reaper Splitter is the brute fighter in the TimeSplitter forces. They are able to release blue bolts of energy, which does a small amount damage. These splitters are the only ones which appear in the cutscenes of TimeSplitters 2. They have a characteristic open mouth. Their arms resemble Scythes which is probably why they are known as Reapers.