Well we know that in the earlier phases like phase one or phase two, Russel treated noodle like his daughter. She was his little girl. I would predict that in phase 3, he would treat her the same way but a bit differently being that she is way older now. Honestly I think that after el manana, all 3 boys would have been more cautious with her as she definitely looked more womanly. You know by being less playful and less involved… Trust me it was probably a culture shock having her come back full curves and boobs.
Now 2d and Russell probably have a brotherly relationship. If you look back the Gorillaz gbites, you can tell that were kind of brotherly roommates. They will gladly mess around with each other (no pun intended guys get your head out of the clouds) and clearly like hanging out. Plus, it seems like Russ was the on looking out for 2D when Murdoc was being an ass. It isn’t in-depth but I hope it helps! Overall, no matter how much the bastard bassist claims, they all love one and other. A big ol’ family of goof ball musicians. ^.^