>>11520229Most likely 100% mechanical/artificial as their organic creators have probably perished in the eons it took to reach us. But if they're still organic, they're probably cybernetically augmented to the point of basically being brains in machines.
But to answer the question you probably meant to ask: either they would have arms for tool manipulation. That's the only thing for certain. There's no reason to assume anything else, so odds are they'd look as weird as the most bizarre creatures we've encountered. Think insects, cave salamanders, deep sea creatures, etc.
