He resides within the Isle of Vigils and is found in their dojo, watching people train.
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He is respectful towards those who save his Vigils, and even feels as if he is in their debt while also valuing strength, stating that he'll only teach those who "display some level of competence".
Evengarde is one of, if not the strongest Galebreather of the modern age.
Evengarde, somehow, knows of the Lord Regent's true nature, and wishes to remove him. However, as the Authority is present in the East and is growing more desperate by the day, removing the Lord Regent would almost certainly result in them carrying out a last ditch full frontal assault, the scale of which not even Evengarde could repel, especially given the distance erisia is from the Isle of Vigils and the logistical and tactical issues that would come with it.
As a result, he's biding his time and searching for powerful allies so that they may allow the kingdom of erisia to finally stand on its own after decades being pushed around by the Ministry and the Authority.