Satoru Akefu

明負 悟

Satoru Akefu is the head doctor at the TG university hospital and has been using Holy Joestar-Kira as a test subject for his Locacaca 6521. He is also allegedly 89 years old. [Spoiler] He is eventually revealed to be the Stand Wonder of U and the assumed identity of Tooru created using his Stand ability. [/Spoiler] (Source: JoJo Wiki)