Stick figure

The stick figure is a crafted mob, who follows a player and provides a nature buff (basically increased tick speed, so plant life growth, and increased health regeneration, etc). He is crafted by placing a bookshelf in the head slot of an armor stand, he's very flammable but he has a medium HP (e.g. horse or llama) and is easily distracted by fire, bookshelves, and lecterns, but could be convinced to continue following if he is given books.