Talon Company is a mercenary organization active in the Capital Wasteland. They are for some reason have contracts to kill Cywren Caster. It is unknown who is giving them these contracts, however they did first appear after she disabled the bomb in Megaton.
Even as far as mercenaries go, these men and women are vicious, killing anyone that doesn't wear their emblem. The reason for this is simple: in 2277, they are working for an unknown third party, with simple orders: keep the Capital Wasteland a lawless, disorganized place. As Cywren has good karma this might be the reason they are hunting her down.
They appeared in an early episode of Another Fallout Tale, but had no interest with Cywren.