Board Thread:General Discussion/@comment-26871105-20150812150806/@comment-26871105-20150824120933

Mikitaka, although only appears like 3-4 times in Part 4, did show an "evil" side of him on 1 occasion when he told Josuke that he had brainwashed a woman into thinking that he was her own son.

If it's actually true that he's an alien, he might not be as pure and good natured as we first thought.

So it can be possible that the lawyer is indeed Mikitaka, nobody knows.