[He is scared, that Ariel will destroy the Ariel of this world. But he refuses to acknowledge it, because he knows too intimately how Ariel's mind games work, and if he treats it as trivial it gives this world's Ariel the knowledge that he's believed in. He doesn't think they're separate, he knows the other Ariel's aware, that his reactions to his old Ariel will affect the new one. Tristan's been Ariel's victim enough of his life to know what he's seeing.]

You sound desperate. Honestly, I'd like to talk to my real brother, if you're done posturing.