Madam Jo

Madame Jo is one of the masters Eun Aran faces off in chapter 1 of the webtoon.

The start of the New Murim Alliance
Story starts off Aran facing off against Masters of Murim, Madam Jo attacks and he flings her away then he sneaks behind her and defeats her with a back palm thrust. Then President Kim steps up and attacks him with his combined arts. Aran able to dodge his first attack then finishes him with a ki attack.