The Fourth Doll of the Rozen Maiden, Souseiseki is Suiseiseki's younger "twin sister", although her appearance is somewhat masculine. Like Suiseiseki, she has the power to enter human dreams, and carries a set of pruning shears that she uses to tend human soul trees. Unlike Suiseiseki, she is calm, quiet and deeply devoted to their "Master". She attacks ruthlessly if required, using her shears, although this weapon puts her at a great disadvantage with defense. In contrast to her sister, Souseiseki is incredibly quiet, composed, and analytical. She possesses the same sharp mouth that Shinku has and will not tolerate anything which does not meet the standard. The twins both share the same stubbornness, however. Her artificial spirit is named for a fragrance by Lolita Lempicka. She is presented much more in the anime than the manga.
In the manga, her master wanted to use Souseiseki's power to enter other people's dreams and exact revenge on his brother's lover, who he felt had stolen his brother from him. As Souseiseki alone can not achieve this goal, she fights Suiseiseki to gather the two gardeners' tools Lempika and Sui Dream, which together can affect an individual's soul tree. However, she eventually realizes that it's her master's heart that needs changing instead, and sacrifices herself to free it. The dolls in the scene are shocked from Souseiseki's actions and Suigintou uses the confusion to snatch Souseiseki's Rosa Mystica.
In the anime, Souseiseki is devoted to a lonesome old man, who uses her as a substitute for his deceased son, Kazuki.
In Rozen Maiden Träumend, Souseiseki and Shinku are initially the only dolls that strongly refuse to participate the Alice game. However, during the later course of Träumend, she was manipulated by Suigintou and Barasuishou into starting the Alice Game, losing to Suigintou.
Even though the two versions progress differently, Suigintou is still the doll who took Souseiseki's Rosa Mystica, becoming the second doll to lose the Alice Game (the first being Hinaichigo) and the first doll to lose her Rosa Mystica.
Medium: Motoharu Shibasaki (Anime) Kazuha Yuibishi (Manga)
Artificial Spirit: Lempicka (レンピカ)
Voiced by: Rika Morinaga (森永理科) (Japanese)
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If needed to, I'll add more numbers.
