According to early in the first novel, Ares is a workaholic who (if left alone) will NOT STOP WORKING, even going so far as to use holy techniques to keep himself awake and reduce fatigue.
Much of the dialogue between Amelia and Ares is the former worrying over the latter overworking himself and the latter going, "This is nothing; I once stayed up 3.5 nights in a row to fight off an undead invasion across 3 towns" or something like that.
His official stats as of the character stats at the end of Volume 1 lists his luck as literally Zero. Poor dude.
Above is a link to a site that lets you download pdfs of the novel volumes. If you can manage to get through all the link-shortener things, there are 4 volumes available in English.
The end of Volume 1 coincides with the aftermath of Ares' fight with the demon vampire and the Hero's decision to go to the Tomb
It’s stressful how poorly his plans work out. A comment noted he has zero luck and it’s painfully obvious lol
Still the new fake priest seems like a sweet addition.
The lunatic Gregory on the other hand represents everything that’s bad about religious extremists, even defying the rulings of their own belief because they feel they have the power and therefore right to do as they see fit.