Unfortunately there is no player model or npc for the characters. You may be able to pull off some clever expressions if you can.
This models comes with skins, bodygroups, facepose and fingerpose. There may be more characters planned in later updates if possible. In case you are having trouble trying to animate them, you can use the animated prop or easy animation tool to make your workflow abit easier. But here's the fun part: the models contain animations. Originated from the mobile game M&M's Adventure, this pack comes with the avaliable characters. 'M&M's - They melt in your mouth, not in your maps.'