Daken?

[Rose]

Ok, so WHO'S been controlling Daken all these years, do we know? and why?

[Megalictis]

The implication is that it's Romulus, through agents like the Winter Soldier who killed his mother to Cyber who seems to have trained him, to Wild Child and the like who act as his handlers.

As to "why" - Romulus motives aren't clear yet, and information about him is vague. He may be immortal and thousands of years old. He seems to be playing out some sort of "survival of the fittest" genetic manipulation of an early "mutant sub-species" in order to produce the perfect survivor. This contest seems to play-out between blonde and black-haired representatives of the species. That's about all we've been spoon-fed so far and any of that is subject to future modification.

[Rose]

I think Romulus is your best bet, winter solider only killed Itsu as a way to call Wolverine out (I think) The main man probably had Cyber train Daken, just for the fact of the fighting skills. Which makes you wonder, why didn't this mystery manipulator do his own dirty work? Is he too old, or just too cocky, kind of like: Why should I when I can have someone else?
Then I'm not too sure about wild child, didn't they say that so far only Daken knows who the boss is...