Matter-of-fact kind of guy, who general is a very patient person whose world is rarely shaken. Hole in a sky shakes it little bit though.

Max is just a very regular looking fellow, like Sera said "looking kinda plain."

Maxwell is a quiet, thoughtful man whose silence makes him seem either bored or shy. He is neither, and cherises almost all kinds of company as along it’s not mean-spirited. He speaks carefully and politely, choosing his words wisely, often trying to find the best compromises and smartests solutions. Since he’s not very loud or brash he might come across humourless or very boring, and he tends to describe himself as such.

Though being quite observant he can’t stand procastinationing and likes to deal with things as they come and how they are. He is quick to take action and make decisions, which is probably why he can take the role of a leader when necessary, even when he himself might not like it. Someone has to do, might as well be him.

Max doesn’t share much of his personal thoughts or opinions, especially if they are not anyway related to some common problem. He is suspicious and slow to trust, but not because he thinks everyone is there to get him. No, he just thinks he’s not that interesting, and that people should focus on the ones that are. He holds his few friends very dear, but he also knows his own flaws and tries to learn to think himself as not-boring. Though he wouldn’t complain about it or have a long soul searchin moment about it, he’s attitude does make him feel lonely, sometimes. Especially now when the world has gone strange and the cozy Circle days are far behind.

[ Codex Entry ]

The Trevelyans are nobility from Ostwick, a city-state on the southern coast of the Free Marches. It is an old and distinguished family, in good standing among its peers, and with strong ties to the Chantry. Its youngest sons and daughters—those third- or fourth-born children with little chance of becoming heirs—often join the Chantry to become templars or clerics. As a mage, however, Lord Maxwell Trevelyan was expected to spend his life in the Ostwick Circle of Magi.

A sedate place, the Ostwick Circle did not decide in favor of either templars or mages, clinging to neutrality during the rebellion. Max was chosen as a delegate to the Conclave in the hopes his noble position would provide protection for his fellow mages while negotiation continued. Trevelyan was the only survivor of the explosion that rocked the Temple of Sacred Ashes.

His 'playthrough' with some personal letters can be found here.