Heartess
Silvia cuts Joseph with a knife for hours until she can't take his screaming anymore. The two go to the Keeper's cave, and they run when he emerges. Joseph collapses before they can get back to the room, so Silvia puts up a forcefield and teleports behind the Keeper. She later drinks Joseph's blood and explains that it's what the STEM System has done to her.
Selfish
Joseph allows Silvia to drink more of his blood, and she nearly kills him while they have sex. Sebastian shows up and tries to convince Joseph to go back with him, which Joseph refuses. Silvia's lack of blood consumption over the four day period between her having sex with Joseph and Sebastian's appearance causes her to become a more evil version of herself, and she drinks from a person other than Joseph. When Joseph finds her, she walks away after calling herself a monster, and to Joseph's horror, reveals that she had killed Kidman.
Upcoming Chapters
Murderer
Joseph begins to act strange in front of Silvia because of who she has killed.
Silent Flow of Blood
Silvia attempts to kill herself by cutting her wrists.