Dave Bosoy (credited as Dave the Mate) is a minor character in Grand Theft Auto IV.
Bosoy was a crew member who Niko Bellic worked with on the Platypus ship during its voyage to Liberty City. Bosoy is seen in the very first cutscene tied to his bunkbed, wearing erotic leather clothing and being whipped by an unknown Asian woman, also in sexual leather clothing, while Niko stands outside the door trying to get him ready for docking.
According to Weazel News and the Liberty Tree website, Bosoy's body was later found floating in the Humboldt River trussed up in a straitjacket and diaper, covered in whip lashings. His cause of death is unknown. Hossan Ramzy will send Niko an email asking if he heard about Dave's death.
Bosoy was voiced by Martin Herring.
- Non-chronologically Bosoy speaks the first lines in Grand Theft Auto IV and the HD Universe, repeatedly yelling "Daddy's back you bitches!"