Name – Lon
Species – Manussan
Planet – Manussa
Temperament – bored
Appearances – Snakedance

Lon was the bored son of Lady Tanha of Manussa. His ancestor had banished the Mara five hundred years earlier. He was possessed by the Mara, and persuaded Ambril to let him use the Great Crystal during the ceremony in which the Mara planned to recreate itself. The Mara was destroyed by the Doctor, and Lon was freed.