>Don't - write a role early and never add to it.

It is perfectly valid to give a character's background and it is not a thing that should be updated (it rather should not).

It is not required for a role to translate and describe current character actions like subtitles in a movie. You may just watch the character itself (actually it is a preferred way).

While you personally may build your role in subtitles-style, it should not be enforced in events like the Role Contest.