Hallucinations are coming my way

The mascots are mainly the reason why Alex has nightmares and hallucinations, he uses "medication" for this that his personal health care doctor had gave him. His nightmares are the mascots but in a disordered version of them, messed up, nonhuman traits with tall, sharp claws and sharp teeth. And instead of them being robots, they are actual animals that rather murderous. Sometimes he has dreams of these children, some his age and others not. But they are dead..? By how they look, it seems very strange to him. The hallucinations he has is dead people, of all ages.. Like whispering towards his ear.. Telling him a message. A very important message.

Alex also has strange hallucinations of a small child named Lucretia..?

W̶a̶s̶n̶'̶t̶ ̶t̶h̶e̶ ̶g̶i̶r̶l̶ ̶t̶h̶a̶t̶ ̶h̶a̶d̶ ̶a̶ ̶h̶e̶a̶r̶t̶ ̶a̶t̶t̶a̶c̶k̶?̶