As the eldest daughter, she is, by tradition, to inherit her family's Ryokan, although she prefers to live in the city.
She is a very shy, polite, and delicate person, unlike her sister Yumi. She is devoted to the Ryokan and her family heritage, although, being the youngest daughter in the Shimizu family, she is not going to inherit the inn. Miwako Shimizu (Mikano Fukaya) – Miwako is the receptionist at the Ryokan Hiei.She is the only playable character in the game, which means the player must solve the mystery from her perspective.
The game is loosely based on two books, Tour of Danger (1992) and The Thirteenth Pearl (1979). There are two levels of gameplay, Junior and Senior detective modes, each offering a different difficulty level of puzzles and hints, however neither of these changes affect the actual plot of the game. Players take on the first-person view of fictional amateur sleuth Nancy Drew and must solve the mystery through interrogation of suspects, solving puzzles, and discovering clues. It has an ESRB rating of E10+ for moments of mild violence and disturbing imagery. The game is available for play on Microsoft Windows and Mac OS X platforms. Shadow at the Water's Edge is the 23rd installment in the Nancy Drew point-and-click adventure game series by Her Interactive.