Dick's honestly in a weird position here. Normally, he'd probably be part of the rebellion. But as the Head of Security and Tactical officer for the ship, he's going to come down on the side of the current command structure. He'll back up Nathan and Rtas with the Daligig and use his best diplomatic everything to help out. With luck, the fact that he's siding with the ship will help, given what happened on Galilee. The Daligig should know that he'll do what he believes is right.