Bookman Jr is the title designated for the individual destined to inherit the role of Bookman—there can only ever be one at a time. Before Lavi's birth, this title was held by an enigmatic figure, commonly referred to within the fandom as the former (or previous) Bookman Jr. The former Bookman Jr is depicted as a bespectacled young man with long silver hair tied in a ponytail and a prominent scar running through his right eye. His hair color is identical to Allen's, and his droopy eyes bear a resemblance to Lavi’s.