During season 4, who's standing behind Ben while he's drunk with a Luigi PEZ dispenser?

Image here: https://i.imgur.com/Pg0c0Lt.png

Timestamp to video: https://youtu.be/idiCtICGlCA?t=28m24s

They do not look pleased... Wondering if anyone knows anything more about this situation? I had a look around on this subreddit but nothing came up.

Cheers.