"I'll give you until next Saturday to make your decision," Ciel said after explaining to them the seriousness of the situation. "Think carefully. I will not force any of you to take the serum, but if you choose not to, please, keep the promise you made and not tell this to anyone."
As for those who intended to take the serum, he cautioned them not to think of themselves as one of those superheroes that they see in the movies.
Their opponents would be real people. He stressed that their enemies would not only be the organization called "Memento Mori", but other greedy people like politicians, and those who would covet the powers that they held for their own personal use.
If they were to carelessly expose their powers to the public then it would only bring them unnecessary harm. Keeping a low profile was a necessity.
"I can make my decision now," Neville said excitedly. "Let me take the serum."