Since they were raised together, they used to train together, eat together, and spend a lot of time as a group. They all have comparable skills, except for their strength and durability. Their performances were group-choreographed and group-performed. Whenever they were going, or whatever they were ordering, they had to have it ordered in sixes.
After hours they all had different hobbies. Remi was a soprano voice, Katsuki was a tenor, Samrit, a mezzo-soprano, Halid was an alto, Hajime sung country-like arias, while Octavian had a fabulous jazz-ready voice. They decided to create a vocal group so they could perform together.