The Chime are a group of independent problem solvers who are utilized by various employers to perform activities that they do not want traced back to them or which they cannot endorse. Often this involves illegal or very dangerous activities. The Chime have been labelled a terrorist group by the press and authorities of Counterweight.
Purportedly members of the Chime utilizes bell related call signs. However, only Aria has used one and Cassander has made it a point to only utilize his real name when asked for a callsign.