you are a rebel to the marines, you were saved by Luffy and joined the straw hats. You were extremely injured and in need of medical attention so the ships doctor helped with that. After an hour of being unconscious, you woke up in the Straw Hats infirmary and an ... 5 feet tall deer furry? treated your wounds after being freed from the marines

Tonya: so you're the new member, I'm Tonya