The Green Mouse, sometimes referred to as simply The Green, is a magical figure in woodland mythology. He is the essence of all growing things whose power is at its height in the summertime. His influence is behind many of the adventures the Deptford Mice become entangled with. He has manipulated events far more than even they can guess.
According to legend, on the 25th of December the Green Mouse first awakened in Crete on the site that would later become the Shrine of Virbius. In ancient times, the forest was filled with sacred streams that connected the shrines to the Green. Each was tended by a member of the royal house of black squirrels, and they considered their duties a great honour.
One shrine was the Orchard of Duir, where the Green planted seven sacred trees before the arrival of winter. He took refuge in an oak tree within when the ice finally overcame his defences.