A character sheet is an easy method to keep all your characters in one place. By starting a topic, and then pasting your characters into that topic, you can easily access a character to use for a particular type of roleplay.

While some people prefer to make a new character for every roleplay, it's sometimes nice to revisit a classic character you created in the past. Just make sure to check with the leader of a roleplay to see if it's okay to reuse a character, don't want any reprucussions after all, mhmhmhmmmm.