[shivers a bit at the response from his own signet, folding his arms, but doesn't protest it]

Er, that's just how it is. Humans can't see seraphs normally. Some of my other abilities have been blocked, too, so it's probably related...

[it's weird to think of not being noticed as an 'ability,' since it's usually more of an inconvenience than anything, but logically, it lines up.]