Zyobot
Just a time-traveling robot stranded on Earth.
I got to say, one of my real beef's with the new canon is how it changed Wedge's backstory 180 degrees.
His Legend's backstory was a lot cooler than what we saw in Rebels, where he was an Imperial pilot recruit who defects with Sabine's help.
Now that you mention it, I'm wondering if Disney changed it, just for the cheap thrill of featuring an Original Trilogy character in one of their shows? They're already the brilliant minds behind a subpar Sequel Trilogy, so I don't think they'd be above that.