He runs after him for a while but at a certain point he loses him
After about three hours of searching, Elden's about ready to give up. On a whim, he goes to look in a back alleyway-and finds Zen shut down. His eyes are dull and glassy, and he's completely limp-Zen shut down is one of the most unnerving things Elden has ever seen-he's usually so full of life, and even more so since gaining free will. But right now? He just looks like a giant doll.