Armand Christophe is a redgaurd pilgrim and doyen of the Thieves Guild.
He will wait at night in the Garden of the Dareloth from midnight until dawn for you to come visit him and to recruit new thieves into the guild. He is your first doyen and the one who accepts you into the Thieves Guild.
He has you steal the bust of Llathasa Indarys, which upon your return you find Armand missing and the Waterfront crawling with Imperial City guards. You are informed he went into hiding and a traitor among the Thieves Guild on the Waterfront rated him out. Methredhel, one of the newest members knows it was Myvryna Arano who betrayed them and helps you plant the bust in her house removing all suspicion off Armand.