Cosmina was one of the members of the Empire's Secret Police, Wild Hunt. She was a singer equipped with a microphone; after being critically injured, she was modified by fellow Wild Hunt member Dorothea into a large monstrous creature. Cosmina was a young woman with bob-style haircut and bunny ears accessory on her head. She wore a mini dress, a collar and matching wristbands, boots and a pair of glasses. Prior to her introduction, Cosmina wore a hooded jacket. In her Danger Beast form, Cosmina has a very large body with multiple spider-like legs, while her upper body resembles that of a mantis. She retained her hairstyle and a human-like face, but with sharp teeth in her mouth and a pair of antennae on her head. She also has a philosopher's stone embedded in her chest.

Akame ga Kill!
Night Raid is the covert assassination branch of the Revolutionary Army, an uprising assembled to overthrow Prime Minister Honest, whose avarice and greed for power has lead him to take advantage of the child emperor's inexperience. Without a strong and benevolent leader, the rest of the nation is left to drown in poverty, strife, and ruin. Though the Night Raid members are all experienced killers, they understand that taking lives is far from commendable and that they will likely face retribution as they mercilessly eliminate anyone who stands in the revolution's way. This merry band of assassins' newest member is Tatsumi, a naïve boy from a remote village who had embarked on a journey to help his impoverished hometown and was won over by not only Night Raid's ideals, but also their resolve. Akame ga Kill! follows Tatsumi as he fights the Empire and comes face-to-face with powerful weapons, enemy assassins, challenges to his own morals and values, and ultimately, what it truly means to be an assassin with a cause. [Written by MAL Rewrite]