Madam Yan was put into an important position. She was appointed the counselor, copying the ways at the former Heaven Frigid Kingdom.
Madam Yan actually was not quite good in fights as she was only of the Eternal Realm. That being said, it was not her fighting abilities that Lu Li would be needing. He already had powerful warriors at his service. What he needed Madam Yan for was her resourcefulness and her cruelty.
Madam Yan was nicknamed Black Widow. She had attained perfection in scheming and planning. People would unwittingly walk into her traps and could be killed before they even realized what had happened.
Yu Huashen would deal with all the open attacks, while Madam Yan would focus on secret missions, handling matters that could not be known to the public.