You don't smell like the angels from Eridan's planet.

[Terezi considers this, then reaches out with a clawed hand to pat at Castiel's...arm, that was an arm. Pleased with this starting point she begins to define his shape more precisely by touch. She is very careful not to scratch or otherwise damage him with her claws. He seems to be at least partially human! And humans have thin tender skin.]

Are you a human Earth angel?