"Uncomfortable" is close enough.

[he pushes down the thoughts of what the mist has done to him - tried to crack its way into the heart of his flame in favor of eyeing the other with care.]

Is there anything else strange that you feel, apart from these horns? In your body or in your spirit - the answer is important.

[he's reminded of hearing about urges, and he'd not like to be caught off guard around such a powerful Servant.]