Defeating Blood-Starved Beast will open the way to the Healing Church Workshop, thereby getting to Vicar Amelia without buying the Hunter Chief Emblem.
Killing Djura now will get you the Powder Keg Hunter Badge however, if you wait until later, you can obtain a gesture in addition to the badge.
Enter from the Cathedral Ward, evade Djura's Gatling gun, and continue through to the boss.This area and boss are entirely optional however, they are highly recommended for the items and content they unlock.
