Sonia

No.16 Sonia or more commonly known as Sonia was originally a school teacher of unknown background who became one of the most wanted criminals by the UFS after killing over 100 humans and Demons. Her motives to this day are still unknown, but records showed that she enjoyed torturing and killing her victims in the most horrendous ways. After being captured by the UFS, Sonia was executed by trial, but later revived as a cyborg when the UFS realized they could use her skills as an assassin to secretly eliminate their enemies.