Divinator Gennai Hiraga is a character from the anime Sengoku Collection, presented as a female version of the historical Japanese polymath from the Edo period. Within the series, she is a scientist and inventor of considerable talent, considered one of the most gifted individuals from the Sengoku world. Her visual design is distinctive, featuring blue hair styled in twintails with cheek curls and an ahoge, green eyes, and an outfit that includes a dress, turtleneck, hat, lab coat, and sandals.

Her primary focus is on research and creating unusual inventions, having arrived in a world of infinite possibilities to pursue this passion. A central part of her background involves building a time machine named Wandering Mountain Woman with the aid of her assistant, intending to travel into the future. However, on the night of its planned unveiling, her assistant is involved in a car accident. While the injury is not life-threatening, it would prevent him from participating in a soccer game he had eagerly anticipated for weeks. Motivated by a personal desire to prevent this disappointment for her companion, Gennai decides to alter events. She uses her time machine to travel to the past, an act that results in the destruction of the device itself. This choice successfully prevents the accident and protects her assistant from injury, demonstrating that her actions are driven by a sense of loyalty and care on a personal scale rather than for grander historical reasons. Her role in the overall narrative is primarily contained within her own story episode, where she is featured as a key figure whose actions revolve around her scientific expertise and her relationship with her assistant. Information regarding her personality in any greater depth, her relationships with other characters beyond her assistant, her development throughout the series, or additional specific abilities is not available.