Haijima Industries arc

The Haijima Industries arc is the twelfth arc in the Fire Force manga.

Summary
Shina Kusakabe and Viktor Licht vist Haijima Industries' Skill Development Lab to find and protect Nataku from the company's cruel experiments. Despite Licht's status within the organisation, the pair find themselves underneath under heavy scrutiny and Licht realises that they will not be able to leave freely.

Despite the allegations of abuse, the Haijima researchers show a peaceful and supporting environment for the children and claiming Nataku is at a different facility. However, Shinra senses Nataku's feeling of fear and desperation through the Adolla Link. Which causes he and Licht to realise the young boy is within the building and Haijima is hiding the truth from them.

In order to lessen the mistreatment of the children, Shinra agrees to partake in a combat experiment to give Haijima data on the Adolla Burst. Kurono enters the testing area and they begin to fight, with Kurono quickly overpowering Shinra with his smoke powers and being able to counter Shinra's Rapid attacks using his right arm. After Shinra attempts to hit him with a barrage of kicks, Kurono manages to drive him back with his smoke and then solidifying it into a series of blades to cut Shinra down. The researchers tell Kurono to pause the experimate but he simply uses his smoke to block their vision and continue the fight. Before they can react, Licht and the other scientists are alerted to Nataku's powers awakening and growing out of control due to Shinra's power. As such, Licht alerts Captain Akitaru to this development and opens the exit from laboratory to allow Shinra to escape so they can find Nataku.