Arthur is an Artificial Intelligence, mimicking the logic systems of reploids. Arthur was a project developed by both Alia and Gage and has a prototype system developed by Alia that protects Arthur's systems from all forms of viruses.

Arthur acts as a navigator, helping hunters in missions and also supplies hunters with interesting, though not always helpful, information. Arthur works with a special satellite system that is able to get through most interference to hunters on the field.

Arthur has a deep interest in 20th Century media and has been known to bring such 'knowledge' up during missions.