User blog comment:Bankai99/That's Some Real Devotion/@comment-3119203-20111107031138

Ok, you are forgetting that both of these characters fought for their lives alongside the Straw Hats, fighting with someone makes a true bond with someone, as shown by soldiers at war. Anyways, Franky took like a week building the Thousand Sunny, and Luffy was on Amazon Lily and Impel Down for quite some time, as shown by the fact that he spent hours (maybe even days, i dont know) getting healed by Ivankov. Brook is probably super grateful to Luffy because 1)He recovered his shadow, 2)He was the first person who he had seen in a long time, and 3)He wasnt really frightened by Brook at all. They are best buds. Period.