So “those things” are apparently actually evil, and Cal was once(?) actually alive.
Whatever, or whoever Cal is, was trying to communicate with Dave in the alternate timeline.
It may or may not be a being similar to Doc Scratch.
If there is something alive within Cal, I think it is trapped.
Regardless, uu does not know the details of Dirk’s Cal, potentially indicating that he is both aware of other similar puppets existing and that Cal’s true identity is still a mystery after this session ends.
Or that he never bothered to “research” it.
Whatever the fuck those puppets are, they obviously cause a shit ton of trouble down the road.