Seán: "Those are the only ways that Inhuman Nobodies can exist, other than ending up in the Kingdom Hearts galaxy..." *cough* "... in which they can become Nobodies just like any other being in this galaxy..."
Siobhán: "... I feel weird..." *cough* "... as though... I'm weak..."
Lexus: "I feel just fine. I'm not a Nobody, after all, but an Unknown."

PK: "An Unknown?"

Lexus: "If a fusion-created being - example, Vegito or Gotenks - would be turned into a Nobody, they instead end up like me. An Unknown. Immune to everything... except the Void element. I tend to think of it as a Nobody Dusk that has control over its shape, it's emotions, and so on."