Elden Ring | Who is Mesmer, The Impaler ?

Elden ring shadow of the Erdtree DLC trailer was shown today and my brain is generating lore theories faster than torrent. I AM SO EXCITED
but tell who you think Mesmer. the Impaler is really? a young Rykard? child of the Gloam-eyed queen? another child of Marika? nightmare manifestation?
#eldenring #eldenringdlc