[Oh right. Higekiri can't remember shit.]

Prompto-san, your roommate, elder brother. [He lets Higekiri through.] The one who left us the first week. He stayed with us and Grune-nii, and Dimitri-san. His name was Prompto. He--

[But when he looks back, there's no one there... Bewildered, he glances up and down the hall, and then he just... eases inside after Higekiri.]

I think I can see his spirit roaming because of the drug.