Due to Rei being out on the battlefield most of the year, their Aunt, Tori, turned into more of a babysitter and Triston protected Accalia with his life. Outside of his social life, the majority of his time was spent with his younger sister. From playing pretend, singing her to sleep, and getting into some mischief, both him and Accalia were nearly inseparable with the average sibling bickering.

As Triston got into the position of apprenticeship, he became more well-versed in combat. Similar to Rei and Accalia, he inherited telekinesis and incorporated it into his combat, but didn't rely on it as much. A long while after, Accalia joined him as a Komanderi apprentice under someone else, and they were commonly put up against each other- which usually ended up with Triston winning, to put it simply. When he was deemed fit, the Komanderi before him, Gero, stepped down and passed the torch.

For what he's most well known for, it was for being the first to discover the Archangel-Navi's identity. Afterwards, he was recklessly eager to help her, but Rei stopped him before he did something he'd regret. He was nearly stripped of his title when others found out about him and the first rank commander lying about who the A-N was, but he remained after convincing them all over reasons unknown. Now, he is currently sealed away like the other Komanderi and not a word has been heard from him since.