Fireflies

The Fireflies are a revolutionary militia group featured in Black Blood and Black Blood Part II. They revolt against military oppression in numerous Quarantine Zones in the hopes of eventually restoring the US government. However, they are currently losing the war against FEDRA. Along this, the Fireflies are one of the few organized groups still searching for a cure for the cordyceps brain infection (CBI) and will do whatever it takes to accomplish it.

The militia group is spread throughout the country, but their most recent main base is located at St. Mary's Hospital in Salt Lake City. Alongside the Fireflies, normal civilians from Quarantine Zones also may rise up due to food shortages and Firefly agitation. When comparing the Fireflies to these unaffiliated rebels, the latter will typically possess greater numbers and are more brutal, but also less organized and more desperate. Marlene led the group since its formation until her death in 2034. The current leader is unknown.