Most Helpful Guy
Niko Bellic. Seems like he's the only one caught up in the middle of other people's messes in GTA. Everyone else is a hardened, professional criminals. When you play as Niko, you're playing as a guy struggling to get by in a new city. That's much more relatable and it's a lot easier to put your emotions into that game.
Most Helpful Girl
I've only played GTA5 and I'd have to say Trevor is my favorite. But I also really like the black dude, forgot his name