1) No one person may have more than 3 characters, 3 is the MAXIMUM
2) Unless you plan with another character to make a character pair, like brothers and sisters your two characters will more than likely won't know each other, unless one character is very large or made a play in their life, it's like knowing the name of the President of the US
3) If you wanna make your character some sort of leader or entity, go ahead but don't expect (unless the other rper wants to) people to follow your orders, no matter what. You can be the kind of England and you can be talking to a peasant and they'll not do what you say
4) If you make a personality, stick with it. I (and many other rpers) hate when a character acts like they aren't supposed to
5) CHARACTERS CAN NOT BREAK THE FOURTH WALL. Unless something is blatantly obvious, the character won't know everything that's going on just because the rper typed it. It's like player a made his/her char think "Damn she is hot" in her head and then character B says "Why thank you," or if player a is hiding from player b and says he is in an alley, and player b AUTOMATTICALLY goes in that alley before checking anywhere else