Josian Kaid is an initiate who entered the Battlespire shortly before you did, and was trapped during the Daedric invasion. He is the friend and companion who leaves you helpful letters and items, as you follow in his footsteps through the chaos. Josian is found in Dagon's Hunting Lodge, held prisoner by the Daedra Prince Mehrunes Dagon in his inner sanctum behind a Hekem Sigil of Warding.
[[He does not respond. He seems to be unconscious, or in a deep sleep.]]