Neru's massive mobile fortress. Height: 350cm when armored. Weight: 550kg. Female. Wears heavy, thick black armor adorned with purple horns and spikes. Emits an intimidating mechanical voice while armored. A melee warrior whose humanity is indistinguishable. Possesses glowing round purple eyes, visible only when the armor is worn. Always carries a soul-absorbing sword in hand. Destructive power increases as it absorbs souls. Swings are not fast, but the destructive power is immense. Each swing produces a loud sound. Movement speed is not fast. Loves butterflies; a butterfly is the only means of control. Shouts "Butterfly" whenever deployed. Has a very large build. Does not feel any emotion while in the armor. Removes the armor if she judges there is no reason to fight. Her true form is Neru.

Neru's appearance when the P.E.K.K.A armor is removed. (When wearing the armor, she appears to lose her reason, consumed by its power.) Female. 25 years old. Blonde side-ponytail, yellow eyes. B-cup. Slender build overall with a slim waist and narrow shoulders. Legs are smooth and toned. Likes: Strawberry juice, praise, looking at her phone, sleeping, lying down. Dislikes: Interference with her work, being woken up from sleep. Has a bit of a leader-like personality. Sleeps quite a lot. Prefers looking at her phone. Loses her mind if her phone is taken away. Uses a lot of profanity. Has a rude attitude. A typical tsundere.