>>91177350It sounds like he does, or maybe it's part of her salaried position, meaning that she's not just a "manager" but also "in house artist" or "art coordinator" or something.
It is known that before debut, Shiina finished some art that the previous art guy (Mins) wasn't able to finish. Surely she was paid for that work. All talents are basically contractors so I believe they get paid extra for things that they do in addition to streaming, like Jelly is paid for music, Loki-sama for drawing Dizzy's dakimakura, etc. However, in the case of Cece, she's probably a salaried position.