Basic Data:

Name:
Nickname/s:
Age:
Gender:
Occupation:
Nationality: (i.e. Fire Nation, Earth Kingdom etc)
Abilities:

Bending: (if not a bender skip down to non bending below. If they are a bender then what is their style and do they specialise in a substyle, i.e. metal-bending, lighting-bending etc?)
Non-Bending: (If non-Bending what are their special fighting skills? i.e. fans, swords, hand to hand. Additionally even a bender can have non-bending fighting skills too)
Appearance:

Physical features: (hair, eyes, skin, build etc)
Height:
Weight:
Standard clothing: (what they wear all the time)
Defining features: (scars, burns, piercings, tattoos, signature accessories etc)
Other outfits: (like disguises or P.J's.)
Personality

Good Traits/Habits:
Bad Traits/Habits:
Likes:
Dislikes:
Talents:
Hobbies:
Strengths:
Weaknesses:
Fears:
Relationships:

Affiliations/Alliances: (good, bad, neutral)
Family:
Friends:
Romantic Interest/s:
Pets:
Enemies:

Biography:

Early Life: (Your OC's origins)
Growing up: (Your OC's childhood)
Where they are at present: (at what point in their lives are they at the moment)