"I beg your pardon?...No, You must be mistaken"
Due to the three Butlers having a strikingly similar appearance, Claude is often mistaken for Sebastian or William- Which gets on his nerves greatly, however he tries not to show it, merely brushing it aside. However due to the fact that he does secretly care, he will try and change his appearance slightly to look different- though it doesn't seem to have any affect.
"Yes, Your highness"
'Your Highness' Was not a nickname chosen by Claude himself for Alois, however due to his fondness for the young boy he really doesn't mind and shall continue to call him it- Always have and always will.