Does Chopper Join Luffy Crew. She could be the only one that laughs at Robins morbid jokes. Here check it out -.
Chopper joins the crew in Episode 90 91. Nami probably wouldnt mind another gal pal that wasnt as introverted as Robin. Luffy explicitly said Law is on my crew.
Choppers time far from the crew was a short one however had actually the crew lost to Foxy the would very well need to stay together a crewmate of the silver Fox forever.
She could be the only one that laughs at Robins morbid jokes. He tries to eat him. Sanji does not sleep in the kitchen Zoro does not sleep in the crows nest Chopper does not sleep in the infirmary bed which is supposed to remain clean and sterile and Brook does indeed sleep. After fighting together through out the arc Chopper accepts.