We do realize that more that one person will want to be a certain character. Therefore, characters will be placed in groups.
Example:
We may have 3 people turn up and take up Ron, Hermione and Harry.
Then someone else may come along and want Hermione. Not too worry.
The first 3 people will make up Group 1 the new Hermoine will make up group 2. These Groups will be posted up in the taken characters section so we can all keep track of who is were and who belongs too whom.