I personally disagree since Force users are supposed to be Gods that can't be touched "by mere mortals".
but at any rate to MY dual, are their any apprentice level characters (force sensitive or not, I don't care so much) that would like to fight a younger Haru? You may age your character your char accordingly though it is not suggested, because Haru will be 55 years younger. I think (other than the freeze heads like Moridin or Emberli) that Haru is probably the oldest char out there.
If you decided to join, you'd be fighting a Shaper of Kro Var who was a soldier, and specialized in shaping Earth, so I'd only be using those powers really. I'd prefer it if we were fighting on Kro Var as to me that makes the most sense. Perhaps your ship crash landed and Haru stumbled upon you. The sight of advanced technology makes him freak and attempt to attack you and destroy the rest of your ship with his Earth Shaping.
To be honest I have no idea how we are going to get that ship to crash 55 years ago. Perhaps you accidentally fell back in time some how? Fighting off some faction experimenting with the technology and it causes the ship to jump backwards in time and crash into a mountain side on Kro Var? Or perhaps this could be a future based thread, and the Haru you are facing now is a younger clone with his essence in it (kinda like Palpatine), and the reason why you're trying to kill him is because no one deserves that technology, or he's become a terrible Warmonger, or maybe you want to be immortal too; lastly, a possibility could be is that you are simply hired to kill him.