Perverse Investigations*), no concrete or direct details exist regarding a character named "Nami Sudou." The series centers on seven unnamed female students investigated by four male peers following the murder of their teacher, Professor Yuko. These students are collectively identified as suspects in the homicide case, with no individual names or characterizations extending beyond their shared role. Production credits, character listings, and plot summaries uniformly omit any reference to "Nami Sudou."