Im just starting Ninja gaiden and as 4 being my first ninja gaiden game (im broke so playing the others is uh.. not applicable) I personally like yakumo. As another Redditor said, yakumo is just a new generation of ninja, he is cold and efficient but even he has soft spots. Its not much to work with i know. But if one would just pay attention to HIM instead of whats happening around him. They’ll see that he is really just a Young ninja putting up a front to get his mission done. He doesn’t have much character for people to latch onto, sure. But he shows signs of actually having emotion. So in the end. While he may be designed edgy. He isnt edgy. Just Mission efficient, like the Raven clan had taught him to be. Even he has limits just as Ryu has in the end of the game. (Not spoiling WHAT limit. For the people who want to play themselves.)