If I delete an iCloud will if delete everything?

Okay so I used to have an iPod and I set up my iCloud on that iPod but got an iphone recently. I now have my iCloud on my iphone but I have my iPod to my cousin and the iCloud are on two devices and I don't want her on my iCloud anymore. If I delete her off of my iCloud will it delete everything on her iPod?

No. When you delete an icloud you remove the icloud account from the device. The actual account still exists. Also when you delete icloud from a device it will ask if you want to keep or delete the content broguht over from icloud onto that device. Any stuff that was put on the device manaually and not from icloud is left alone.

It WILL remove photos brought over from the photostream and documents and data brought over from icloud.