So here we have a rough explanation about our current guild rank system.
Everyone starts out as Newborn Legend.
Then, your direction is determined by what you actually do. If you contribute a lot, help other guild members a lot and do the "regular" things people do in every guild, you may progress this way:
Enigmatic Hero → Dedicated Adventurer → Epic Legend
However, if you participate in roleplaying a lot, you may progress another way:
Dreamy Wanderer → Senior Escapist → Envoy of Imagination
Basically, the staff decides when someone deserves to be promoted. Reasons for promotion are high-handed to some extent, and the effort needed for promotion is not countable. If you think you would deserve to be promoted, you may ask for it.