Different forms Grandark can assume

Grandark Human

Grandark's Humanoid Form

The Grandark (referred as Gran by Zero) is one of three legendary Demon weapons, the other two being Eclipse and Transcendence. There is a soul embedded within the blade. Grandark can only be wielded by Zero, but it is said that Void also wants the Grandark.

The blade was created and infused with an essence by Oz Pone Max Reinhardt as an attempt to counter Void's Eclipse. However, the ego refused to let his creator or anyone else wield him, as they were deemed "weak". After a long time, Oz artificially created a stronger body, Zero, whom Grandark accepted as his wielder.

According to an interview, it is said that Grandark's ego is "strong enough to bring Ancients down to their knees".

In the dialogue of Kamiki's Castle, Zero dragged Grandark along the ground as he wandered the world, leaving odd markings in its place.

As Zero's confidence grew weaker as he tried to seek more power, Grandark's influence over his body became stronger. However, the blade was confronted with the danger of Zero's will gradually disappearing and became quite frustrated, knowing that his wielder would no longer have control, and therefore, Grandark would become unusable. As Vanisher, Grandark's influence became further taxing on Zero's body, thus the name of his job. Eventually, Zero lost all consciousness, but the Ancient Demon Core within him revitalizes Zero, allowing him to Advance and rise up without the demands of Grandark.

Zero uses Grandark both offensively and defensively. Grandark's abilities include striking with deadly firepower, extending the blade, blocking and reflecting projectiles, project thorns, absorb the energies of other beings, produce elemental spheres, increase Zero's potential, transform, and fire wave energy. However, due to Grandark's immense power, it also hinders Zero's mobility in the process.

According to the Naver Blog, Grandark, like Eclipse, possesses humanoid form that appears as a male. The purpose of this form has yet to be revealed.

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