Cass acting like this was definitely... different. He was just so clueless to the evil around him that it pissed Dean off, vanishing after saying something like "Don't like conflict". However, Cass liked you, and he would describe every fun fact about bees he could find every chance he got.

You were alone with him in a room, "angelsitting", as you did some research while the Winchesters were off talking to Crowley. You suddenly feel a hand on your shoulder, and it startled you for a second before realizing it was him.

"So, none of this should cause you any ill effect. I went to a little farm in Normandy for the wheat and the lettuce and the tomato," he starts "And I thoroughly examined and comforted the pig before I... slaughtered it for the ham." He follows by handing you a sandwich on a plate "Here, you need your strength."