The Chime are a group of independent problem solvers who have been hired 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 labeled a terrorist group by the press and authorities of Counterweight.
Purportedly, members of the Chime utilize bell-related call signs. However, only Aria has used one, and Cassander even made it a point to utilize their real name when asked for a callsign.