Riya was electrocuted because of another item that he bought before he stepped out of the mansion to kill her. It was another sticker. The person he placed this sticker on was electrocuted every time he said the word 'Thunder'.
"I know that you don't die, but I have many ways to kill you that you can't even think of. I would have already killed you to complete my mission, but since you're from Uprising, I want to use you to get some answers. Answer my questions, and I'll let you go. Don't answer me, and I'll keep torturing you," Ryder told her. "The decision is yours."
"First answer this. Do you have any chip in your brain that will kill you if you start answering me? It shouldn't be useful since you're still alive after being shot in the head a few times. Your brain is already blasted off. Still, tell me if you can answer without dying or not," Ryder asked her.
"I can answer," The girl replied. "But I won't answer."