Souseiseki (蒼星石, Lapislazuli Stone / Blue Star Stone) is the fourth doll to be created by Rozen. She is the younger twin sister of Suiseiseki.
Between both continuities, her backstory is considerably different. She also initially appears antagonistic in the manga while in the anime she does not adopt this character role.
Yamamoto • Mr. Umeoka • Futaba Yuibishi • Alice (Rozen Maiden (2008))
Kazuki Shibasaki • Matsu Shibasaki • Yuna Kuwata • Hitomi Sakamoto • Enju
Ageha • Yamaguchi • Megu's Father • Megu's Nurse • James • Head Manager