Aria

Aria is the former leader of Giglio Nero Famiglia. She is the mother of Uni and the daughter of Luce. In the Future Arc she was said to be dead due to an illness, most probably the Non-Tri-Ni-Sette/ Negative Seven Rays since she took on the curse. In Gamma's flashback, she and Gamma had a close boss & subordinate relationship (implied in the manga to be romantically intimate).