Actually, Arenvald tells the Resistance people, and I'm vague quoting 'I'm a half Garlean, as you can see."
So I don't know if hiding Garlean heritage is an option. Next to that, I think due to Garlean purebloods being so rare, I don't think a lot of Eorzeans know how they look like? That might be the reason Cid gets away with it? I'm not sure.
Either way, Arenvald heavily implied that people can see what he is. At least the Resistance/Ala Mhigan people can. And they probably have seen a few more purebloods than most Eorzeans have? Hells if I know!
So I don't know if hiding Garlean heritage is an option. Next to that, I think due to Garlean purebloods being so rare, I don't think a lot of Eorzeans know how they look like? That might be the reason Cid gets away with it? I'm not sure.
Either way, Arenvald heavily implied that people can see what he is. At least the Resistance/Ala Mhigan people can. And they probably have seen a few more purebloods than most Eorzeans have? Hells if I know!