[Winry's got an eye for unusual limbs; it's come from years of trying to see all she could of people's often-covered automail. Still, she hasn't seen this guy before somehow, and just so happens to be passing by this edge of the dome as Kazuma is slumped against it, giving her a chance to take a look at the red, orange, and yellow limb as she passes by.
As far as she can see, she's not sure what it is. After her experience with Allen she's being a bit more skeptical about the looks of things, so she might need to take a closer examination. It's definitely got a metallic shine to it, even though it looks like it's been painted, but from this distance she can't quite make it out. She'll have to get a bit closer first.
Well, why not just ask? She proceeds, walking right up to the resting boy, sneaking glances at that arm curiously once she stops a couple meters away and addresses him with a smile. It's distracting enough that she hasn't even really noticed his bruises.]
Um, excuse me... Is your arm automail by chance? Or something like cybernetics?