Waru

The Demon Sword, Waru (ラグ, Waru), is Crona Ssssoussuu weapon. Waru is the first Demon Sword created by Sidkami and is fused with the Death Sword. Waru has taken to absorbing any soul, evil or not. By taking innocent souls, Waru lost what little sanity he had and his power had grown out of control and it matched Crona's making them the perfect combination.

Appearance
Waru stretches out of Crona's back, as he is physically merged with Crona's blood. Waru has a very muscular body, large gloved hands, and spikes on several parts of his body, but no legs. His face consists of a large egg shape, with no visible mouth and a giant white X on his face where his nose should be, with large ping-pong ball-like eyes with Xs for pupils. As the series progressed, Waru becomes even more muscular and larger, showing his continuation to eat innocent souls.

Waru's soul is red and has the giant 'X' that is present on the center of his face. After the absorption of a vast amount of innocent souls, resulting in his Black Dragon form, where two thin wings are extended outwards from the top of his soul.

Personality
In great contrast to Crona's meek and mild manner of speech and submissive personality, Waru is loud-mouthed, rude and confident. He believes he and his handler are capable of overcoming any opponent, regardless of how good or bad they actually are at fighting. He is also very violent and easily angered, especially around humans. Waru has also displayed a habit of calling other people names.

Waru loves to degrade and pester Crona (even during fights) by giving Crona noogies, pinching Crona's nose, hitting Crona on the head, or taking Crona's food. When Crona finally tells Waru to stop, Ragnarok seems surprised at Crona's reaction, hinting that this is not meant in a malicious way.

He tends to use Crona as a human shield against non-deadly attacks. He does worry about Crona's health and will try to help Crona by stopping Crona's bleeding wounds. However, Waru will always ask for thanks afterwards. He also gives him constant vocal motivation during battles, whether they be instructions, compliments or threats.

He is often implied to be insane, presumably caused by him eating so many innocent souls. Though his soul power was evened out after these souls were confiscated, his mental state remained the same.

After Crona Ssssoussuu becomes a Dark-Kami, Waru is sadistic and insane mostly because of Crona being the embodiement of Madness and fear itself, he also would devour children and animals more of his craziness being proved.

Abilities
Waru posses great Demon abilities and lends them to Crona.