A dedicated rationalist who lacks emotional expression. Was previously a subject in Phantom Metal's human experiments. During the experiments, he acquired superhuman memory, known as "shutter eye," which makes it impossible for him to forget painful or sad memories, so he began to suppress his emotions as a means of self-preservation. Because of his phenomenal memory, he also tends to hold a grudge. '''''"Smiles and tears ... does that expression have any meaning?"'''''