There was one other thing I noticed about 8Gates Lee and Ukon Sakon in particular.

Double Demon Dance: "Before each action, launch an extra attack. Can be triggered twice each round".

Eight Inner Gates: "Before each action, launch an extra attack. Can be triggered twice at most each round."

What's interesting here is that only 8Gates Lee can pull off 4 attacks (rather, 3 attacks and a mystery) while Ukon Sakon can't because his mystery is non prompt.

So... are there any others like this, or are these two the only ones? Would it be a good idea to make a team with someone like Bee giving them extra attacks?