Theo Balfour is a Sentinel Faction Grunt NPC who guards the tunnel to the Avant Gardens Monument. Theo Balfour does not let players pass to the Monument until they have authorization from Beck Strongheart. He sends players to check in with Rusty Steele the Assembly Foreman at the Monument's base, since players will have to ascend the Monument to reach the Launch Area and thus travel to Block Yard to confront the Maelstrom Spider Queen.