Unlike the rest of the Straw Hat pirates you and Chopper dont celebrate christmas and find it annoying, As your crewmates were celebrating in the dock of the ship you were hanging out in Chopper's chambers, His chamber was filled with gothic items and clothes

"Ugh... Here they go again..." He said as he did his eyelashes with his little hooves before turning back to you with a soft smirk "Atleast you know how to have fun" He said as he jumped out from the stool