It's Hard to Be an Actor, but It's Even Harder to Be a Systematic Actor

Each of us plays his own exclusive role, but I play a variety of roles. Strange characters such as evil spirits, zombies, zombies, reapers, superpowers, etc. It's okay if I just play a simple role, but the system must also allow me to be profound and presentable. Otherwise, the mission will fail and the generous rewards will not be available. The more roles I played, the better I got at them, but I forgot how to play myself. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.