Ito Ono is starring as Haruna Nagashima, and Junpei Mizobata is playing Yoh. I haven't seen either of them in anything before, but their appearances roughly correspond to the characters.
But, as we all know, it is not the appearance of the actors that truly matters, but how they convey the characters and fit the role. I hope that Mizobata-san and Ono-san do well in their roles, for us, the fans, and so that they can further their careers. I wish them both luck. ^_^