How does Miriam Toews use imagery in A Complicated Kindness: A Novel?

Toews uses imagery in the form of descriptive language to paint a picture of the church's members through Nomi's eyes. "The Mouth of Darkness" is the name that Tash has attached to the leader of the church. Nomi follows her sister's lead and often refers to this man as "The Mouth." Nomi also comes up with a variety of disrespectful names for Menno Simons, the man who is the founder of the Mennonite religion. She refers to him as Menno "I love the nightlife" Simons and Menno "Sexy" Simmons.