A German Harlequin . Born on January 29, 1944 in Berlin to a family with strong Harlequin connections. He grew up using the civilian name Dietrich Schöller. As  Dietrich, he attended Schöneberg Grundschule (elementary school): Gemeindeschule Kolonnenstraße (Berlin Schöneberg) 1950-1954,  and the Gymnasium: Robert-Blum-Oberschule: 1954 -1963. After graduating from the Gymnasium, he studied history for a few years at Freie Universität Berlin. Throughout his childhood, he practiced various forms of martial arts, but resisted pressure from his family to become a Harlequin.

As Dietrich, he traveled to Rome and lived there for a year, studying art. During 1968-1970 Thorn discarded his previous civilian life and adopted his Harlequin name. Thorn was close to the Irish Harlequin, Mother Blessing , as well as the Japanese Harlequin, Sparrow . He traveled to Tokyo after Sparrow's death in failed attempt to defend the surviving Japanese Travelers.

Thorn was involved in North-West Frontier Incident with Harlequins Libra , Willow , and Linden . When a piece of shrapnel hit his spine, Thorn was paralyzed from the waist down. He moved to Prague in 2002 and continued his activities until he killed 2005 by a group of Tabula mercenaries led by Nathan Boone . Thorn was married to the British citizen Veena Singh and is the father of the Harlequin, Maya .