Good day. With the new questing features, some new attribute was added to traders. I am talking about..

Good day. With the new questing features, some new attribute was added to traders. I am talking about "charisma". Can you tell me exactly where can I check what my charisma level is and what it does? I suppose is the thing that lowers enemy troop attributes but... can we find somewhere by how much, what is its level and stuff like that? Thanks.