The other three girlfriends are met online from the dating websites, as from the amusing interactions between Niko Bellic and the women he dates, there can be several in-game benefits to starting a relationship with any of the datable characters.
Putting in a little bit of time to raise the fondness of the girlfriends can unlock their "special abilities"; these can help in particularly difficult missions late in the game.
Niko will quickly dismiss this by saying "I really don't know about that sort of thing, Michelle" amongst other things.She likes Niko wearing clothes from the Russian Shop; she thinks clothes bought at Perseus make Niko look like a criminal.Michelle prefers variety, expressing interest in new cars and pointing out if Niko is wearing the same outfit or takes her to the same place constantly (though her reaction to him wearing the same outfit is not actually negative as she always adds "I like it").Whenever Niko takes Michelle to a bar, she never gets drunk while Niko does, and stumbles about.
Niko will often comment on this, saying things like, "Were you drinking in there?
Preferences Kate Mc Reary is introduced in the mission Harboring a Grudge.