Blueno

ブルーノ

About five years ago, Blueno opened his own bar in the backstreets of Water Seven, naming it simply "Blueno's Bar." Located in a seedy part of town where vagrants and ne'erdowells gathered, he at least put on a happy act. In truth, however, this was not the case: Blueno was actually a covert government agent sent to steal the plans for an Ancient Weapon.
It was through this arrangement that Blueno met Franky, the supposed hidden king of Water Seven, and the two formed a friendship of sorts. Again, this was not entirely genuine, but that connection would have repercussions later on.
Blueno consumed the Doa Doa no Mi (Door Door Fruit), which grants him the ability to create doors on any surface. He has even created "air doors" in the air itself, leading to what appears to be another dimension. Blueno can also create doors on people; he did so to Luffy's face, causing it to spin like a revolving door.
Blueno's Tekkai appears to be one of the more powerful versions within the group, and he was the first to demonstrate any variations of the technique.