 Resummoned in the novel "Blood Rites", He Who Walks Behind is described as a dark presence, a terrifying shadow or mist that creeps up on you unseen and undetected, possibly indicating where it gets its name.He Who Walks Behind states that it has not forgotten Harry and was not officially dismissed at the end of the novel, leaving many to believe that Harry will someday have to confront the Outsider yet again.Harry carries a mark on his soul, visible to the Wizard's Sight, from his encounter with He Who Walks Behind; its effects, if any, are unknown.