Dimension Keeper:
As you may already know, first I'll send you to a safe waiting place. Speak with the Rift Post there, they'll let you inside.
They're classified depending on where their responsibilities lie.
The level 30 force is managed by Recruits, level 40 by Privates, level 50 by Officers, level 60 by Generals, level 70 by Commanders and higher-force Heroes. Take heed and visit the manager most suitable for you. Good luck!