I ... *ponders* ... I would go for the "It´s my first part, in which I will be using Kansai-ben". ^_^v Because, I read back then a entry on a blog from one japanese fangirl, that was squeening about him using Kansai-ben, while doing his Oshitari-impersonation. It was like: "... Setomaru~ sfhowefsdf ... Oshitari sfhoaff Kansai-ben! Greato~!!! ..." But, at least, she mentioned it. *lol*

But, since it was only ad-lips, I would surely say it´s not considered a part, only that he is capable to do it. ^_^ Aaaand we know, that he can do a lot with his voice! o*_*o