This character is from the otome Wizardess Heart. Ana is a non reccuring extra, so you will not be required to join the server unless you want to.

Like Vincent, Anna is part of "The Four Knights" which means that she is a Wizard-Knight. She's known Vincent since they were kids, and often picks on him. Though Anna bugs Vincent a lot, she really does care for him and tries her best to look out for him. She's very playful and takes an interest in the protagonist. 

Voice: Any pitch, possibly a bit playful. Example A bit older sounding with a little bit of an authoritative voice can also work.