He is an optimist, a fantasist, and a liar, and he brought Niko to Liberty City with false promises.
At the beginning of the game, Roman serves as your only friend and as your only connection in the story.
Grand Theft Auto IV's protagonist, Niko Bellic, is an ex-soldier from Eastern Europe who moved to Liberty City to escape his past and pursue the "American Dream." Niko was persuaded to move by his cousin Roman, who claimed to be living there with beautiful women, sports cars and lots of money.
It soon becomes apparent, however, that Roman lied in order to cover up his own failures in life - the truth is he runs a failing taxi business, has mounting debts, and various criminals from Liberty City's underworld have put a price on his head.
Reaching 100% fondness with all five girlfriends is not required to achieve completion of the game.