Ms.HamatoAlexander is an administrator and content moderator, one of several here. This wiki itself is crafted and updated by all of us who are able to do so—even you can contribute, with TMNTPedia:Policy and TMNTPedia:Manual of Style as your guides. And she did not create this message wall thread, either—it is an automated welcome message to new users, posted in her name, as she is prepared to assist new users if they need help. She did not actually speak until her comment just below your first response.
I am just another user and am not an administrator or content moderator, but I know a lot about this wiki.