Nina

Nina is the 5th Herrscher, located in France and was friend of Yssring Leavtruth.

Houkai Gakuen 2 mainline

Newborn

Because she suffers from painlessness, she tends to self-harm and was bullied by other people in the orphanage. In the orphanage, she met Yssring who was fostered there. The two became friends. Yssring promised Nina that she would be cured of her painlessness.

After being operated on by the Valkyrie by the Schicksal, she became a Herrscher, which caused the Paris Houkai breakout, and was identified as the 5th - Herrscher of Metal. After becoming a Herrscher, she has a body that is harder than steel and the ability to manipulate metal and fight with Maria Schariac of Schicksal. Due to Nina's body being too hard, Mushoku Kika reached a cooperation with Yssring, and together they sealed Nina in the Houkai compartment. Nina also regained her senses, but it is a fact that she has become a Herrscher. However, the Herrscher power repaired her flaws, the painlessness disappeared, and Nina felt the pain for the first time. The doctor also thought of using the Stigmata Terminal to try to rescue Nina. But for a long time, Ninti Apokalypse appeared and saved Mushoku Kika. Nina, who had once again fought with Schicksal, returned to her form.

In order to cover the doctor's retreat and fight with the three S-rank Valkyries of Schicksal, she gradually upgraded her body during the battle. To feel the pain and die as a human being, Nina pierced her weapon into her heart and died. After the Herrscher was recovered by the Schicksal, the artificial Herrscher experiment was conducted.

Wonderland

After Nina reincarnated in the Servant continent, it happened that the fruit of evil caused a mutation, and she also ran away. In order to find the warden who took care of Storm Island, Tia & Luya invited the new servant Nina, and Nina accepted it with pleasure. After confirming that Nina wouldn't be affected by the Desire Perfume, and after fighting to confirm Nina's strength, Tia & Luya began to explain to her the job requirements of the warden, but Nina ignored Emerald's green hair. The two chased up. Later, Nina, who was affected by the Flowers of Evil, recognized Emerald as Yssring. After hearing Emerald's scream, Tia & Luya came to the rescue and threw the warden who had been in office for half an hour into the prison on Storm Island.