Sebastian(?) didn't try to escape when Aqua stopped to rant to Heno, partially because doing so effectively on the soft terrain would require then to shift into another form, and rendering their denial of being a shapeshifter null, and partially because they did still want answers about their predicament, and having shown themselves asking about it, might as well see it through. They did, however, continue to put distance between themselves and Aqua, standing up once they were behind the well.
Their gaze briefly moved to Shara as she stormed off, but quickly looked back to Aqua and those dealing with her.