It is a common sentiment among forum posters and the general community that Trahearne is a bad character. He is commonly described as an unnecessary, credit-stealing Mary Sue/Marty Stu who ruins the personal story.
I’m going to make a bold statement in regards to Trahearne. He is not a Mary/Marty, nor is he a bad character in his own right. The way he is presented and integrated into the story, however, is awful.
On his birth and Wild Hunt
Trahearne is the first Sylvari, assigned to a special and important task by the Pale Tree. It is natural that she would have a special goal in mind for her first child, and so the importance of his particular quest should not come as a surprise, particularly when one considers the critical nature of Wild Hunts assigned to Firstborn Sylvari as a whole.
Trahearne’s hunt is to cleanse Orr – a difficult task that comes across as abstract, if not impossible. The gravity of the goal that has been thrust on him is a heavy weight that has intimidated and crushed him, though, to his credit, he took the task head on and lived alone in Orr for years to observe and learn about Zhaitan, Orr, and the Undead.
On his perceived perfect reputation.
The biggest source of his Mary Sue label may come from the sheer reverence that he receives from all three Orders. Certainly, it would seem that this is undue and unearned on the surface.
The fact of the matter, however, is that the respect he received from the Orders was entirely earned, albeit offscreen.
Let’s start with the Priory, as this one should be obvious. They are an organization of scholars and explorers. Trahearne is the foremost scholar on Orr and the only known individual with extensive, hands-on knowledge of the Undead hierarchy and of Zhaitan. This naturally puts him in a prestigious position among Tyria’s scholars. It wouldn’t be much of a stretch to say that he has earned a status on par with any magister of the priory. In a perfect world, he would, in fact, be a gifted Priory scholar.
To understand his appeal to the Order of Whispers requires a bit more analysis of his accomplishments, but it is not much of a stretch and it does not require a great deal of lore theorycrafting. To survive alone in Orr requires stealth. Trahearne, whether it is shown by the game or not, would have naturally needed to be quite accomplished in this field or would have needed to adapt to this requirement quickly in order to make it to the position that he enjoys today. Even ignoring this necessary talent, which would make him a natural fit into the Order of Whispers, albeit with training, he also possesses a wealth of knowledge on Zhaitan and the Undead. Like the Priory, the Order craves knowledge and its acolytes, therefore, would love to have Trahearne in their ranks.
Now onto the Vigil. Why would an order of warriors have such great respect for a “simpering scholar,” as its members have described the Priory? It’s simple, really. Trahearne may come across as hesitant and emotionless, but the mere idea of stepping into Orr, much less living there is a concept that requires considerable courage to face. But let’s ignore this quality, for this is not the source his real value to the Vigil. Again, it doesn’t come down to any new kitten -pulled trait of perfection, but rather to his already-established knowledge of the undead, which holds immense and valuable tactical knowledge to the Vigil. Though Trahearne is certainly not a trained tactician, if the Vigil had managed to train him and add him to their numbers, he would have become an asset to their force.
Here we have a simple, logical explanation as to the immense value that the Orders have assigned to him. This is why he is a natural fit to lead all of them.