Aria, the seventh sub-unit of the popular girl group tripleS managed by MODHAUS, was a fan-favorite unit composed of five talented members. Fans were given the exciting opportunity to vote for four members to join DaHyun in a special ballad GRAVITY, titled "Grand Gravity: Ballad Dimension", with seven possible combinations to choose from. After a thrilling voting period from November 22 to November 24, Team D emerged as the winners, consisting of JiWoo, ChaeYeon, Kaede, and Nien. The unit's name, Aria, was also decided by fans through a GRAVITY event, "Event Gravity: Ballad Dimension Name", where fans selected from nine suggested names between November 28 to November 30. Aria marked their debut on January 15, 2024, with their emotional single album "Structure of Sadness", captivating listeners with their powerful vocals and heartfelt performances. Get ready to be swept away by the harmonious sounds of Aria as they showcase their talents to the world.