Shinku is the fifth Rozen Maiden doll and the first to appear in the series. She embodies the traditional Victorian aristocrat. She is extremely demanding and can seem unappreciative of others, even though this is often not the case. Her favorite words are “tea“, “servant” and “What?” She seems to enjoy lecturing, slapping, and generally abusing Jun, her medium, at every opportunity. She is perceived as rather angry, but it is a facade that she puts up to show that she feels that she is most deserving of becoming Alice. Shinku is also perceived as being cold, but she is actually very protective of and cares deeply for her sisters and for Jun. She can be relied on for the occasional bit of parent-like wisdom. Despite her aristocratic quirks, Shinku is by far the most level-headed doll living in Jun’s house. Shinku’s presence at the Sakurada home has led to other Rozen Maidens appearing there. She hates cats because one almost swallowed her wind-up key in the past.
Shinku does not use honorific suffixes such as “-chan,” “-san,” or “-kun,” except when she refers to “Father” and Mitsu. Despite her relative youth amongst the Rozen Maidens, the other dolls look up to her as an older sister, and a worthy challenger in the Alice Game, something that seems uncommon in the series. Shinku does have a cute side, which is evident in her intense, almost obsessive, admiration for the puppet detective Kun Kun (She thinks they are connected by an invisible thread). In an anime episode, it’s shown that she had even won a human contest and received a Kun Kun cosplay. Jun was once able to win her over during an argument by using a Kun Kun doll.
In combat, Shinku fights with rose petal-based attacks, making her one of the strongest dolls in battle. The rose petals are extremely versatile; Shinku can direct them to spread out for wide-ranging attacks, or group them together to use as a shield. Her other weapon is a cane, which she skillfully wields like a sword. Shinku has other special powers, such as restoring broken objects, typically Jun’s bedroom windows after Suiseiseki and Souseiseki show up, with a form of time-reversing magic.