Heart Pirates

The Heart Pirates are an infamous and notable rookie pirate crew discovered on the Shabondy Archipelago around the time the Straw Hat Pirates arrived there. Their potential is further seen with the release of Haki by Silvers Rayleigh, upon which nearly every notable crewmate save one were not affected.

Pirate Flag
Like many other pirates from the North Blue, the Heart Pirates do not use a skull and crosbones, but a smiley instead, possibly symbolising the "Age of Dreams".

Crewmates
The most prominent feature of the crew is that they are all wearing the same boilersuit. The same boilersuit have also been seen worn by the Tenryuubito and their slaves, with the only difference being that the Heart Pirates have their Jolly Roger on their suits.

Trivia

 * Amongst all the Supernova Crews, next to the Straw Hat Pirates, the Heart Pirates is the crew with the most known members.