Thomas is a character in episode 13 credited as being voiced by Reiko Takagi. He has a light effeminate voice much like his friend Jan does.

In episode 16 he announces to the other servants that Polly may be going to London instead of Emma.

5m10s into episode 16 it is mentioned by Mrs. Wieck (to Emma with Hans present) that he and Jan are also being considered for a trip to England