"Yes, poke in the needle as deep as you can. Don't worry, it is not enough to kill him." said the King as he seemed to be slightly struggling to keep the retainer under control.
Knowing that she had no time for hesitation, Rei nodded and started disinfecting the needle with a small bottle of alcohol. Then, after taking a deep breath, she poked the needle into the back neck of the retainer. As soon as Rei poked the needle, the King released his grip on the retainer and swiftly stepped back a few steps while pulling Rei into his arm and covering up her eyes.