Jesto is an Elf first seen in Bean's nightmare in "Spy Vs. Spy Vs. Spy".
Jesto is in many ways an Elf-version of the jester, right down to the costume. Since he is only seen in Bean's dream, it is unknown if he actually exists or is just a figment of her imagination. In the dream, King Rulo chews out Bean for not giving Dreamland Castle to the Elves even though she knows it originally belonged to them, and orders Jesto to throw Bean into the ocean through a trapdoor. As he does so, Jesto shouts "Oh Yes"; the opposite of the Jester's catchphrase "Oh No".