All info is taken from the Gachiakuta Wiki! Due to the writing still being developed, we will be using the info for determining the va for the series

Zanka Nijiku is a character in Gachiakuta. He’s a member of the Cleaners in team Akuta.

Zanka was born into the prestigious Nijiku Family and was expected to become a Hell Guard like his older sister and brother. To fulfill this expectation, he enrolled in the Central Hell Guard Training Academy in the Kamutari District as a trainee, where he quickly rose to the top of his class. However, his dominance was short-lived when another trainee, Hyo, joined and surpassed his abilities, Zanka realized that he couldn’t hope to compare to a genius like her. Disheartened, Zanka ran away and met Enjin, who inspired him to become a Cleaner and become strong enough to surpass geniuses.

On the exterior, Zanka often keeps a calm, neutral composure and even when upset keeps a seemingly still face. On the interior, he is chaotic and quick to lose control of his emotions. Whether it's anger or disgust; he will let out these emotions in quite exaggerated outbursts, which he sometimes reveals to the outside world. Even feeling happy or excited, he is quick to cover up said emotions and prevent himself from smiling. Compared to his more quirky teammates, Zanka is usually serious and no-nonsense on the job, but tends to gets caught up their flow and joining in their antics. Tomme Mima considers Zanka as one of the people that can "knock any sanity" into their more awkward, whimsical members. Zanka carries himself with a confident and polite demeanor, though he can be very blunt, sarcastic, and unabashed in stating his opinions.

Zanka has his own unique view of other people, categorizing them as either “average” or a “genius." As member of the noble Nijiku Family, Zanka has a lot of pride, but doesn't show-off or treat other people badly, despite being a bit arrogant in his thoughts. In the past, he used to think of himself as a genius, but getting outperformed by an actual genius, he acknowledged as average and humbled himself. While he does feels resentment towards “geniuses” and saw them as people not needing to work hard to be great, he doesn't behave negatively or it take out on them, as Zanka is cordial with Rudo and tried to hide his jealously towards Hyo.

He’s accepted himself average and strives to improve himself to surpass geniuses with hard work alone to demonstrate that average people can be just as great. As Enjin puts it, Zanka fights against his own weakness, which makes him mentally strong. Zanka also states he doesn't blame his shortcomings or failures in battle on others and dislikes receiving pity. Zanka shown to be very observant and a critical thinker, such when ponders over the increasing mysteries surrounding Rudo and other various strange happenings. Zanka's general maturity, intelligence and capability makes him well-respected around the Cleaners, as even his boss Arkha Corvus comes to him for insight on the Hell Guard.