One of the characters in the Project Shrine Maiden universe.
Note: Though it is not officially confirmed, as the creator makes no comments on the PC98 games, it is highly likely that the character Yuka from the 4th and 5th installment is the same character as the character Yuka Kazami in the 9th game.
Yuka Kazami is a daemon and debuted as the stage 5 and 6 boss in the 4th game Lotus Land Story. She reappeared as a playable character in the 5th game Mystic Square, and then again, much later in the 9th game, the versus-shmup Phantasmagoria of Flower View. As such, she is the only character apart from Reimu and Marisa who has transferred from the PC98 games.