The Absolute is mentioned both as male and female. I think it manifests itself as it chooses, to better manipulate the given figure (whether they answer better to a male or female authority figure). I agree with Harbs Narbs analyses that the Absolute is the Dead Three teaming up with a group of illithid. In the current timeline, the Dead Three are not full fledged deities so it makes sense for them to want to consolidate power.
