Normally he is indeed gentlemanly. However, he is not a true gentleman, but merely playing the part of "myself as a gentleman". He becomes emotionally attached to the Master while saying "what a wonderful lovely voice". He is mixing you up with the songstress of the past. His wish for the Holy Grail is "for the songstress that I guided to receive the greatest honor in the world". Therefore, he will probably care for the Master more than anything.