Solemn One
From Tardis Wiki, the free Doctor Who reference
Solemn Ones ran the Necropolitan. They were omni-denominational and intra-dimensional. They enforced the rituals of the Necropolitan.
When a murder victim was found in the lower levels, they enlisted the help of the Fifth Doctor, who was visiting the Necropolitan with Tegan and Nyssa. (PROSE: Wake)
