This is the standard character sheet:

[hider=CS]
[b]Name:[/b]
[b]Physical Form:[/b] ((Here you can put your person's appearance, and some brief info on your character's species/race as well))
[b]Abilities:[/b] ((Any magic that they're good at? What about melee? If they can fly or something, mention that. You get the picture.))
[b]Personality:[/b]
[b]Wants/Needs:[/b] ((Is your character driven by bloodlust? Greed? Do they just want promotions? This will help determine how the Dungeon Keeper rewards you.))
[b]Relationships:[/b] ((If you want to start off with friends or rivals you can. Otherwise this can be filled out as we go along.))
[b]Backstory:[/b] ((So what has your character done? How did they arrive at this wretched cave where our Dungeon Keeper is now located?))
[b]Other:[/b] ((Anything else that you want to mention?))[/hider]

...and here is the character sheet of the Dungeon Keeper, to use as an example:

[hider=Your Master!][b]Name:[/b] Whatever his real name is, he hasn't told any of his minions. He demands to be called the Overlord, Master, Dungeon Keeper, or simply 'boss'.

[b]Physical Form:[/b] He may appear to be just human, a simple warlock, but make no mistake: possessing that frail human body is an ancient and incredibly powerful demon. The demon's unadulterated malevolence is made visible to the eye by the glowing lines and strange symbols that adorn his face, and his crimson eyes that seem to reflect the deepest pits of hell like a lake reflects the moon. 
[hider=Picture][img]http://pre02.deviantart.net/a447/th/pre/f/2014/139/c/d/the__warlock_by_bogdan_mrk-d7iyg64.jpg[/img][/hider]

[b]Abilities:[/b] The Dungeon Keeper is essentially a demigod; he is aware of everything that happens inside his own dungeon (and with some simple magic he can see what is happening elsewhere), with a flick of his wrist he could incinerate a dozen people, and overall he could match at least five or six of his champions at once, blow for blow. On top of this he is a powerful warlock, capable of performing all manner of black magic, summoning monstrous beasts or brokering deals with other demons. 

He has two fatal weaknesses, however: the first is his human form. He is not the sort of demon that is a massive hulk of red flesh; he is stuck within this fragile body, and while he is harder to kill than a normal human he is still an easy target for any that can withstand his might for long enough to retaliate. His second weakness is that all of his power stems from what he refers to as his Dungeon Heart, and so this heart must be protected at all costs. For these two reasons, don't expect to see him fighting much. He'll have his champions doing that sort of dirty work.

[b]Personality:[/b] He is ruthless, seemingly without compassion or care for anything. Brutal and valuing effectiveness over all other traits, one of the quickest ways to his good side is to obey his orders and exceed his expectations. He is not much for words, and not terribly approachable either. Still, if one of his minions hatched a devious enough plan, he might at least listen and consider it.

[b]Wants/Needs:[/b] He's utterly hellbent upon enslaving the mortal races and conquering the world.

[b]Relationships:[/b] Unless listed otherwise, he feels rather neutral towards your character, or hasn't been left with any impression.

[hider=List]Twich - He's watching this one. Twich seems both competent and useful, so the Master likes him.

That Which Consumes Peace - The Dungeon Keeper is rather agitated with him, after the incident with Shukra.

Shukra - Shukra seems rather ballsy and arrogant. Even though the Master took Shukra's side, he still feels that the warlord might need to be put in his place. 

Athinar - Bold, and seems like he might be a good leader. While he doesn't necessarily like Athinar, he will humor his request and grant him a few chances to prove himself as a leader.[/hider]

[b]Backstory:[/b] This invasion of his has been years in the planning; for many centuries he writhed in the abyss of the infernal realm, until he finally managed to escape into this world. Then, he lurked in the darkness, always on the run, biding his time until he sensed that the time was right. Now, that time has come, and through various means he's been gathering together a horde of evil the likes of which this world hasn't seen in thousands of years.[/hider]