Goode B. Johnny

Relationships
Con D. Uctor - The only man Rocky claims to be his equal in terms of musical talent

Haki
While not formally trained in haki when Rocky becomes enthralled in a performance he unlocks a small part of his observation haki. He can sense and see the energy as well as the emotion of the crowd that is watching him. This skill allows him to see how people's mind and body react to his music and can change it to better suit his audience.