Nefris

Nefris was a female Red Wizards of Thay headmistress of the Academy of Shapers and Binders. She was the one that first attire the Kalach-Cha to Rashemen manipulating her daughters Lienna and Safiya. However it's was discovered that she was under hidden orders of the Founder and she was a partial reincarnation of her. For this the Akachi's brother Araman, under a Mirkul's geas, led a coup in the academy and captured the Founder and killed Nefris.