Haibuchi Ena is a Hyena hybrid.
She's an young girl with dark brown hair and B-Cup sized breasts
She has the looks necessary to convincingly pass for a wholesome, innocent Idol Singer. But her pretty face conceals a vicious serial rapist that enjoys dominating other women. She also has an obsession with preying on other female Brutes she consider "cute" including Pure and Eruza as she tried to rape her around Chapter 44. Despite her cunning and sadistic, She tends to get very fearful when coming across stronger Brutes like Taiga and try to avoid them as possible when she knows she's out of their league. However, Ena comes to the rescue during the battle against Nodoka, effectively turning the tide of the battle by latching on to the giant's neck. Her assistance gives Pure's team the help necessary to start dealing real damage to the giant.
She has the power and cunningness of female hyena.
- Haibuchi Ena vs Inui Pure (No result)
- Haibuchi Ena and Inui Pure vs Nakanishi Taiga (Interrupted)
- Haibuchi Ena vs Uzaki Nodoka (Interrupted)
- Haibuchi Ena vs Okajima Ichinosuke (Lost)
- Her name is a wordplay on her Brute animal; "Hai"buchi "Ena".
- Female Spotted Hyenas have pseudo-penises, and upon taking on her Brute form, she acquires one as well.