The Head Doctor is Tooru's Stand. it's more obvious when Tooru appeared first before the HD. He was behind both Yasuho & Mitsuba on the 3rd floor. Then behind Josuke & Mamezuku in the lobby. Tooru activated the Stand Ability back then.
Tooru's Stand is the "Clash" of Part 8.
And people told me "JoBiN iSnT tHe MaIn ViLlAiN"
Anyone who thinks otherwise is clearly ignorant to the facts at hand. What more proof do you need. Akefu hasn't killed a soul in the Higashikata and their friends but name the number of kills Jobin has under his belt: Ojiro, Makorin, almost...