The current Demon Lord.

Spoiler

She is the Origin Taratect, Ancient Divine Beast, and Ruler of Gluttony. She is the origin of all Taratects in the System, and thus all spiders can be considered her kin. The Queen Taratects and Puppet Taratects are her closest kin, having wills and personalities of their own, and are not dominated by Kin Control, even though she has this skill.

(Source: Kumo Desu ga, Nani ka? Wiki)