Prina Prima Pururina 「プリナ=プリマ=プルリナ」

Futanari Princess Prina Prima Pururina 「プリナ=プリマ=プルリナ」¹⁾,
is the title character of the Dungeoneering Princess arc within The Great Works of Alchemy.

Rebis describes Prina as follows:

両性具有者の国家「プルリナ王国」の王女。
行方不明となった母を捜すため、王城の地下にある大迷宮を、夜な夜な彷徨っている。

The royal princess of an androgynous state “Pururina Kingdom”.
In order to look for her missing mother, she wanders about the large labyrinth (which is underground in an imperial castle) every night.

プリナが探索する迷宮と、REBIS DUNGEONとの関係とは？
そしてプリナが守護者に数えられる運命とは、果たして……？

The labyrinth that PURINA is searching, it is the REBIS DUNGEON?
Purina's fate is all upto her protector, as expected. . . ?

The interesting fact about Prina (now that the description is partially translated), is that she is just one of a race of futanari people. For example, there isn't usually multiple futanarikko in any single doujinshi. . .