In Kuroshitsuji, most of the time Mr. Tanaka is drawn in chibified form and says nothing but "ho ho ho". At certain times, however, he reverts back to his normal form for a short amount of time, like when he returned to his former rank of head butler following Sebastian's absence. Is there any significance to this? Does it has any meaning for the story?
Edit: I mean like how Finny was a kaizo-ningen (he underwent an operation to gain inhuman strength) or how Mei Rin was an assassin and Bard was a soldier.