The brain works in mysterious ways! I started thinking about the challenge word - calm, and the connection was made to unruffled. Ruffled then made me think of this swan and its ruffled feathers. He was very calm, gliding quietly across the lake and heading to see if we had any goodies for him.
So there's my ruffled, unruffled friend.
(for those who want to know - swans' feathers ruffle more in the breeding season).