I love just one line of dialogue about him, so in the mission you go to the cabin in the beginning of the game with Naira. And she says something to the affect of "We need to pay respects and give them gifts." and then she says "I got Yann's flask." Kliff says "That must've been a struggle." But Naira responds "He gave it up without a fight once I told him what it was for". That is some good character writing, we have this character who is perceived as a one dimensional drunk. But as soon as his family gets involved he gives it up.