How come Scar, Zira, Kovu and the Outsiders claws are always sticking out but Simba and the Pridelander's are'nt.

I think it's just a detail to add to how they are the villains. As Scar too always had his claws outdrawn.

I think it's because they must always be on edge. Maybe they are just tense. "When I think of what that brute did, I get a little tense." That's what Zira berkata right? I think the answer's there. It makes sence dosen't it?

Kovu's claws weren't always out. Once anda can see that kind of white dot in his eye, I think his claws went back in his paws. He didn't need them, and he changed.