Melusine

Melusine is Fabius Bile's first great vat-born daughter, the experiment that frightened Fulgrim enough to steal her into the Warp. Canticle City made her. The Palace made her dance until stopping meant being eaten. Fulgrim saved her the once. Slaanesh kept the rest.

She walks through Bile's dreams and through rooms that should not hold daemons. Beloved of the Prince and the Phoenician is not a blessing anyone else would want.

At Belial IV she fused with dying Igori, pulled daemons in to keep her father breathing, and left a complete being where two broken ones had been. Bile's work continues. His daughter does not come when called.