Ares and Nemesis are two of the components that require access to the other components. Ares requires Demeter and Nemesis, while Nemesis requires Mors. Each of these clients needs to find the appropriate service.
The requesting client queries Hermes, which knows the least populated service in the desired pool. Hermes provides the address to the least loaded service and the requesting client uses that address to talk to the service directly. If the requested component is not available, no address is returned.
It is assumed to that the components can and will stop working at some point. Therefore the connection between the components can break at any time and should be re-established. If there are no desired components at the current time then the service should continue asking Hermes for that component repeatedly until its found.
When the required component is found it's address is cached and periodically checked. This makes it possible to discover dead services and request new ones from Hermes. Vice-versa - if the connection is ok, there is no need query Hermes for a least loaded service in the pool