A Nymph residing in the Agricoles, Ashe believes that Trellus and Septia are Oathbreakers due to a familial debt of wine unpaid. Because of this, she has enlisted the help of Boreus to disrupt wine deliveries to Mytros to reclaim the debt owed.
As the pair of Lutherian priests have not been punished for breaking an Oath, it would seem that this is not strictly true; but that does not seem to matter to the Nymph.