They are Slannesh somethings, but I can't figure it out.
What are these from the Lure of Power set?
The one of the left looks like a daemonette.
The second would just be a stand-in for a Slaanesh warrior, champion or cultist.
Daemonette on the left. The right is probably a champion/chaos warrior of Slannesh, but could just be a relatively normal human who worships Slannesh as well.