Uh...So, uh... A very weird cycle, among the first of the cycles...Basically, Halt is an Immortal, and Will and Gilan are Mortals but with Immortal souls. Halt and Crowley are looking to create the perfect cycle, (i.e. the books), so as to Turn the two into Immortals. Rosali is an Immortal who guides the cycles, occasionally putting herself in the cycles to see what happens...