Suiran Fou is a Chinese student in the upper-ed class at Hakureiryou Academy. She is the closest friend of Selnia Iori Flameheart, sharing numerous interactions with her throughout the series. Physically, she stands a notable 1.83 meters tall with distinctive violet hair and matching violet eyes, and measurements of 85-62-85.

Her personality reveals contrasting traits: she exhibits shyness and reserve in specific situations, particularly feeling uncomfortable using the academy's public baths with other girls. However, she transforms into an intensely passionate and enthusiastic figure when discussions turn to romance, love stories, or romantic themes, often becoming visibly carried away by such topics.

Though fluent in Japanese, she occasionally interjects Chinese words into her speech. Her background identifies her as Chinese, with the narrative focusing on her school life, her deep friendship with Selnia, and her pronounced reactions to romantic situations.