This is something I just realized but people usually refer to Smoothie as BM YC2 but nowhere is that stated in the series. With Kaido his commanders are ranked on card names: King > Queen > Jack and WB has his commanders referred to as first or second division commanders. But with BM her top 3 Katakuri, Smoothie and Cracker are just called the generals. The only thing we know is that Kata is the strongest which puts him as BM first mate but how did the fandom decide Cracker was the YC3 and Smoothie was the YC2?