Ultra Violet/guide

Rabbit
Go to the Crayon World and enter the shop, collect the coins on the floor around the shop then use 300 coins to buy the Rabbit effect from the rabbit seller.

Headless
Go to the Meat World and find a headless dead body that has blood on the neck at the top-right corner from the door, interact the neck will give you the Headless effect.

Magician
Go to the Forest World and find a small green building to the Church, go right to the Dark Forest and go to the exit will lead you to a door to the Library, find a door to a room that has a blonde girl and magic circle, interact with her will give you the Magician effect.

Shikkenken
Go to the Snow World and find a child/winter youkai that is jumping, interact with him/her will give you the Shikkenken effect.