Rozen Maiden Träumend Souseiseki by Musashiya presents a poised, elegant figure that exudes refined aristocracy. The character is depicted with a long, intricate hairstyle accented by ribbons and a delicate headpiece, and a layered gown with ruffles, lace, and subtle embroidery in cool purples and creams. The sculpt captures her slender silhouette, graceful hands, and a composed, slightly aloof expression that hints at a proud personality. The pose suggests quiet grace and inner strength, while the glossy finish on the dress highlights light reflections. A detailed base evokes a vintage clockwork aesthetic, complementing her refined appearance.

Within the Rozen Maiden series, Souseiseki is one of the Rozen dolls created by Rozen himself. In Träumend, she is part of the sisterhood striving to awaken the true nature of the dolls through the Alice Game, a contest of wills and strategies that governs the fate of the sisters and their young master. Souseiseki's arc centers on loyalty to her counterpart Suiseiseki, moments of stubborn pride, and a gradual opening to trust in the human girl who becomes entwined in their fate. Her journey explores themes of autonomy, identity, and the desire to be understood, while balancing duty with a longing for companionship and resolution. Through changing alliances and the pressures of the game, Souseiseki reveals both vulnerability and resilience, shaping her relationships with the other dolls and with the protagonist as they navigate the mysteries of Rozen's power and the destiny of the Rozen Maidens.