The syringe was previously found by the school entrance for debugging purposes but was moved to the Infirmary. The syringe can be concealed and is seen as suspicious. If a student sees Yandere-chan holding a syringe, her reputation will drop by ten points at high School Atmosphere.
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: She 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: She will cover the victims mouth, then will stab them in the head.
|“||What are you doing, carrying a syringe around? That's weird...||”|
— A student seeing Yandere-chan holding a syringe.