KyuuKyuu-kun
KyuuKyuu-kun (named after the Japanese onomatopoeia of the rubbing noise, exact spelling varies) is a non-NPC character that can be found in the Stairway, which can be reached from the Number World. He is often thought to be an example of phallic imagery present in Yume Nikki. Kyuukyuu-kun is accessed by stabbing an unhappy-looking zipper tile with the Knife effect. The zipper tile is located in the southeast corner of the Numbers world, to the right of the door with 0's and 1's in front of it. The zipper tile's expression changes randomly. If it's in the normal state, the player is advised to wake up and return until it changes. KyuuKyuu-Kun rubs the pole faster if you use the knife effect and slower with the cat effect equipped. Reaction to Kyuukyuu-kun is varied; some players find him adorable and others find him unnerving. It's as if he is wearing a mask. A fake face. That, or he is too busy and perfectly happy with his pole to notice anything else.
"The stare of KyuuKyuu-kun is that of a monster that doesn't know whats going on, the kind of monster that might hug you, and might hug you too hard, and not know when to stop" -Ok Gold, on Uboachan.
FACE
Although FACE is not a character, it is found in the same place as KyuuKyuu-kun, so is often associated with it. Some fans use it as evidence that Madotsuki was raped(some rapists get excited from seeing the victim struggle and not excited when the victim "happily" complies, hence why KyuuKyuu-kun rubs it faster with knife and slower with cat. Even though it could mean that KyuuKyuu-kun is Madotsuki's dream version of someone who could've raped her.), although this can be interpreted as any kind of penis fear. Alternately, it has also been suggested that FACE could be a sleep paralysis hallucination, which fits with the inability to end the event by pressing any buttons, and the fact that Madotsuki awakes once the event ends.