Brian Fioca is an Uru explorer who was a key part of the storyline in Prologue as a supporter of Douglas Sharper. He later went on to form The Great Tree (explorer organization).
In late 2003, Douglas Sharper became disenchanted with the tendency of the DRC to limit explorers' access to Ages and areas of the Ae'gura. He began talking with various explorers, including Fioca. In his journal, Sharper named Fioca as possible leader among the explorers. He later began referring other dissatisfied explorers to Fioca, saying that Fioca was "organizing an underground resistance".
Brian Fioca led an explorer protest on the Great Stair and was one of the explorers present when Phil Henderson disappeared.