Alvis is an eleven year old girl who is the key to opening Exile. When the four mysterian are recited to her she responds and Exile can be taken control of by whoever says the mysteria.

She is often referred to as the "cargo" and is delivered to the Silvana by Claus and Lavie. Throughout the show people attack the Silvana to get their hands on her, or hands back on her as was Anatoray's case.

Eventually she is captured by Delphine and recites two of the mysterian. However, thanks to Lucciola her, Claus, and Dio escape the Guild.

Claus and Lavie transport Alvis through the Grand Stream and to Exile where they say the mysteria and take control of Exile.

Her original caretaker was Gita who she cared deeply for. We also know that her grand father was the one who gave Alex the House Hamilton mysterian and that Delphine tried to have him killed.