Omnigul and Ir yüt

As we rise to stop Crotas armies we also stop his followers. Omnigul his will, calls rally his armies, while Ir yüt sings the song of endings to defend him. After taking a look at there grimore cards I realized that they both look exactly the same. Could they be sisters? This is just pure speculation but none the less I had to share my thoughts. They both are followers of Crota and they strive to defend him. Thanks for reading, feedback is much appreciated and correct me if I'm wrong. This is my first CoK post so its not perfect!