In the game, the syringe is found in the Infirmary.
In Mission Mode, the syringe cannot be detected by metal detectors.
There are 4 killing animations for the syringe, depending on Yandere-chan's level of sanity.
- High Sanity: A swift stab to the right side of the head.
- Medium Sanity: The victim tries to defend themselves, then gets stabbed in the right shoulder, then gets stabbed in the right side of the head.
- Low Sanity: Yandere-chan will grab the victim's neck and tackle them to the ground, the victim will try to defend themselves, as they are stabbed in the head multiple times.
- Stealth Kill: Yandere-chan will cover the victims mouth, then will stab them in the head.
- The syringe was previously found by the school entrance for debugging purposes before finally being moved to the Infirmary when it was implemented.
|“||What are you doing, carrying a syringe around? That's weird...||”|
— A student seeing Yandere-chan holding a syringe.