Larian Studios Forums Baldur's Gate III Baldur's Gate III - General Potential HEAVY spoiler - Wyll and Karlach meeting.

It comes across as Wyll calling her Zariel's disciple, an advocator for an archdevil.

Not being used in its usual Catholic context, but it's not wholly inappropriate. And BG3 is using Latin or some such in its spell incantations, so it's thematic.