I suspected this ever since she made the comment about even cave elves running from her. I am both thrilled that that theory was correct and OH MY GOSH SHE'S ADORABLE! I MEAN WE ALREADY KNEW THAT BUT HER FACE! AAHHHH! Okay I'm good now.
I think maybe it wasn't that Thistle was holding onto his arm super tight but rather he was reaching to grab her hand but she moved away before he was able to. Although if she was grabbing his arm to hard that probably isn't helping his writing any.