Cassian Andor's droid sidekick K-2SO may--eventually--make an appearance at some point on the upcoming spin-off. In a panel for Andor during the Television Critics Association summer press tour, creator and writer Tony Gilroy explained how the character may show up.

"I would say, 'Wait and see,'" said Gilroy. "It's a story we are eager to tell. It's difficult to carry an Imperial droid around with you and not draw all kinds of attention. It's a difficult piece of luggage. When we do it, we'll do it in a spectacular fashion as opposed to presenting it and ignoring it, or presenting it or hiding it, or the bad versions we would have been forced to do."

Or, as star Diego Luna put it, "We have five years [until the story of Rogue One takes place]. If he knew K2 back then there would be no journey to go through."