"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.

I think they use the same excuse: "Their soul is bound to the Black Mage therefore their body can't die."

I'm also pretty disappointed, since not only most theories were shattered, but there is still no info and we are to expect a huge dry spell, like it was this autumn.