"They're an official who's charged with keeping the peace in a certain area. They perform civil marriages instead of having any religious connotations, among other duties. Sometimes they'll act as a judge as well." He shrugs a bit. "It's not something in my own country. We just have priests for such things as weddings."

He's patient in his explanation, curious at how Terezi can relate to it since he has no idea what Trolls do for their government or the actual organized enactment of religion. If there is any.