Rules for Servants:
1. Free will cannot be imposed upon or circumvented! You can guide. You can offer advice and suggestions. You can teach. But you cannot make anyone do anything against their will.
2. Various forms and powers/abilities are allowed but limited. They do not possess the same powers/abilities as the deities they serve.
3. These are done by permission only!
4. Weaknesses apply!
5. The servants only know as much as they are allowed to know. They are certainly not given all the information about their 'charge'/'target', so don't even try it.
6. When given someone to look after, a 'charge', they are given a set of variables and tasks to see through. Sometimes they are only supposed to see the charge through a certain task, sometimes they are supposed to teach them a life-changing lesson. Variations on this theme are allowed, but don't go overboard! I'd hate to have to smack you, but I'll do it if I have to!
7. They do not have to be pious and weak and filled with fervor. They can have a personality! They can have a raunchy sense of humor. They can delight in the times when their charge falls flat on their face. It depends on the personality of the character created.
8. They can have the same pitfalls and foibles as other ordinary beings. Be intelligent with them! Be creative with them!
9. Stupidity with these will be smacked down faster than you can say, "Oh shi*!"