Board Thread:Questions and Answers/@comment-2001:978:2305:1E:601:0:0:1-20181021224619/@comment-32601729-20181210183021

If a unit has a sailor ability, the word "crew" in blue letters appears at the top of the characters tap box, so I don't know why they would have two different indicators. Also, the symbol appears on captains, and only on units that have limit break, so maybe you're misremembering