User licences are per server and not per site, so Lucy only consumes 1 licence. What role a user has (admin, interactor etc) is irrelevant too.
Also there is no concept of an 'admin licence'. All licences are for named users, so a user is licensed and is then granted the role of server admin. So from your above list you either would need 9 licences where one of the named users is also then server admin, or 10 licences where someone not listed is granted server admin.