Shūgetsu Suiren is one of the main characters of Basilisk ~Ōka Ninpō Chō~.
- A child prodigy and one of the Five Flowers of Iga. Although frowned upon by his peers for announcing his want to marry Hibiki, he is the one who respects Hibiki the most as their leader and wants to be her strength. He uses water lilies to determine the position of his enemies, and kills them with blood-sucking water lilies thrown as shuriken.