Nexus 6 or Nex is an artificial Realian dog that Jan Sauer (Ziggy) gives to his stepson, Joaquin Rozas. He is seen in Xenosaga Episode I in a flashback where Joaquin can be seen receiving the dog from his stepfather. Jan apologizes for not being able to get a "real" or non-artificial dog, but Joaquin does not care in the least, and thanks him for the gift. When Joaquin asks what his name is, he replies that it is "Nexus 6." Joaquin does not like this name, however, due to it being his "model number," and decides on the name "Nex." Jan agrees that it is a great name.