You may call me Sir Castaigne, and refer to me with he/him pronouns.
I will soon be the King of this land, by my right in Hastur.
Louis Castaigne is a traitor.

"Ne raillons pas les fous; leur folie dure plus longtemps que la nôtre.... Voila toute la différence."

[Roleplay account, I suppose. It should be rather easy to guess who this is.]