Kadas, if I recall correctly, is Italian. If he did go and sell his account (which I wouldn't really blame him for), that alone would be a good way to test identity. Nonetheless, his English wasn't bad, so people might not know better.
Anyway, yeah, far as I know, only relic he has is Aegis. Was a solid PLD, occasionally did stuff on other jobs, but mainly PLD. Can't say I ever really got into an argument with him while in TG, either.