Tbh i try to do, most of the time, a list of stuff necessary to rp like personality traits, rank, age, gender, health, recent wounds, and such, and i often put an OOC date for the age, like, for example "3 months as of month/day/year", so that i can keep clear track of aging, for i am addicted to it xP
sometimes i'll include a voice, a theme-song and maybe an accent. Like, a black tall wolf dude with gordon ramsay's voice... But plot twist
he's aussie instead. And his theme song is Raw Power from Guns n' Roses.