Is it so? *laughs*
In that case, the answer must be Gurthang
I looked at grey -
Enchantment. - This was many times in Doriath, if you say that Gurthang was 'metaphorically' feeling his master's feelings...about Melian
I looked at inferior -
Confidence. - This also happened, with Turin, if you think 'metaphorically'
I looked at gold -
Truth. - Also with Turin, 'metaphorically' when he saw Glaurung
This is just a shot. If it's wrong, at least tell me if I'm on partly right track