The Teacher had feared all along that Rémy might need to be eliminated when the mission was complete, but by brazenly showing himself in the Temple Church, Rémy had accelerated the necessity dramatically.
There are no more uses of "brazen" in the book.
Show samples from other sources
When I meet her eyes, brazen as a sailor fresh into port, she opens her mouth, as if to rip into me.
Sabaa Tahir -- An Ember in the Ashes
Teachers try t heir best to keep them organized, but this is a high school; the organized lines of elementary school fire drills are long gone, having been replaced by the brazen hormonal zigzags of kids whose bodies are too big for their own good.