"Beyond" - 5th job second skill set

Were Arkarium, Hilla, or Von Leon ever confirmed to actually be dead/in limbo/etc. though? They all keep on showing up unharmed. Most recently at the end of the Zero storyline.

Arkarium was badly injured when Damien awakened with transcendental powers causing Arkarium to transfer its life force from his human form to his snake companoin. In the ending sequence of Arcana, however, you can see that the Black Mage has restored Arkarium's human form.
Will is alive but nobody knows where he is. Hilla is alive, she was last seen talking to the Black Mage in the Heroes of Maple blockbuster.