Midnight entity

When the Crusader Tour shuttle breaks down, the mechanic notices a strange thing which he claims to see it running. This may mean that the creature is humanoid.

During the Crusader Tour to the Sapphire Waterfall, a strange monster attacked the tour bus. The monster knocked on the Shuttle and then possessed Sky Silvestry and the Doctor, before the Hostess threw herself and Sky off the shuttle to save the Doctor. (DW: Midnight)

The entity may have survived the death of Sky but it may still be lurking on the planet of Midnight.