i guess "chill" in the sense that he's the anti-C3PO, who is super extra all the time about being hurt, dying or even just upsetting people.

the rogue one bot was a fighting robot and fatalist, which is my favorite humor. also, he like died for the mission and it made me weepy because i experience robots as more emotionally relatable than most fictional characters. remember that story-within-a-story of that little robot in Season 3 of Fargo. shit fucked me up. oh, Gloria Burgle/Minsky, I am undone!