Talk:Natsuki Subaru/Synopsis/@comment-104.32.216.11-20160725215310/@comment-4436931-20160729152104

It's shown in Arc 5 with Ley. He pats them with his hand while saying their names, then licks the palm of the same hand. The effect is immediate. Otto mentions that he was eating their names so I don't know if eating their memories is a different process or involves the use of his right hand