Arista was the miraculous Birth of Pharynx (who is the only changeling besides Thorax and Chrysalis to have natural reproductive organs.), and because of that he shower natural aptitude at a young age. So much so they Chrysalis herself thought that he was interesting and skillful enough for her to train and eventually become bodyguard to her daughter Gyne. But after spending years in Together he grew a soft spot for the princess and she did and turn. And after many trials the two are now married and are possibly expecting a Larvae of their own soon, currently Arista is second in command of the Changeling military and joins his father in meetings with the other lands military for joined strategy if any incident were to arise.
Arista is a very dutiful man who isn’t intimidated by most things. He is fairly upfront and deliberate with people so to not step around an issue. He is extremely protective of the things he cares about especially his wife Gyne where he will physically threaten people by transforming to scare them off. Because of his upbringing he is more then capable of defending himself and getting things done. He also carries a tremendous amount of guilt for hurting people in the past (both directly and indirectly.) as such he is the kind of person to pay back favors and do things for people as repayment. Because of this guilt Arista partly hates himself for being cruel as well as a constant fear of something happening to the people he cares about makes him a very anxious person when it comes to not succeeding or doing activities with his wife.