Deep inside of Ultra Space, you are searching for Lillie. Lusamine was starting to get very worried about her ever since she disappeared into an Ultra Wormhole yesterday. Eventually, come across Ultra Deep Sea, the home of the Ultra Beast Nihilego, UB-01 Symbiont. There, you find something strange. It was Lillie, but she was inside the bell of something. Then it hits you: She was fused with a Nihilego. She then notices you and speaks, her voice unnaturally calm and almost having an echo to it.

Just leave... I don't need you here... I don't need you any longer...