Nagurun

Nagurun (ナグールン, Nagurun), fan translated as Naghul'n, is Hajime Damemaru's package.

Appearance
Nagurun is either colored light olive or grey, depending on the illustration. After reviving as a creature of darkness in chapter 16, they are colored as dark grey or black and have dark eyes, not unlike Avakian. In their package form, they resemble a bug exoskeleton fashioned into a backpack.

Transformed into a humanoid, their spiky form and skin again resembles the segments of an insect's exoskeleton. The spikes on their face can open into a huge, gaping mouth, and they are seemingly empty inside, ready to act as Damemaru's battle armor. Nagurun's hands can morph into various tools Damemaru uses to hack.

Personality
Unlike Avakian, it is unknown if Nagurun has personality and will of their own, silently following Damemaru's instructions. Shimada and Avakian both expected Nagurun to be able to speak, but Damemaru instead speaks from Nagurun's inside. The technology proficient Damemaru claims to have "modded" Nagurun, which surprises Avakian. Despite this, Damemaru says Nagurun has been a friend to him for his entire life, meaning they at least have a reassuring personality towards Damemaru.

Plot
In chapter 9, Nagurun simply appears as Damemaru's package, and briefly transforms into his battle armor before Damemaru explodes and is captured by the Photosfere. In chapter 13 to 14, Nagurun, now humanoid, follows Shimada and Avakian around, who had taken the corpse of Damemaru with them. During that or before it, Damemaru had also commanded the package to find the control room.

In the following chapter, Nagurun snatches Damemaru away from Misetani Box and swallows him upon his command. Avakian is surprised to see that Nagurun can transform into an armor, and it was his first time seeing such a package. Damemaru, then wearing the package, accompanies Avakian to the asteroid's control room, where Damemaru uses Nagurun to hack into the communication facility to call Moja. He then uses his package to help himself to a ton of data about the Photosfere. In the end, the two escape with the others on the Moja spaceship.

In chapter 16, they revive as a creature of darkness after being subjected to the bizarre influence of the Moja spaceship.

However, due to their appearance within Dazuma’s mental world where it spoke Damemaru’s “true name”, it is confirmed that Naghul’n isn't just a Package and is indeed a living creature. Upon being interrogated on it, Damemaru says that when he was a child untold years ago, he encountered Naghul’n on the verge of death at the hands of the Photosfere, and managed to save their life by fusing them with a package, leading to their current state. He says he doesn't know what Naghul’n truly is and has no explanation for their nature. Moja points out that despite being a living creature, Naghul’n did not turn into a shadow upon entering Dark, meaning Naghul’n is either a Dark native or has the ability to resist even Dark’s extreme environment, an unheard of ability.

Abilities

 * Armor: Damemaru can deploy Nagurun as battle armor, covering his entire body - along with Damemaru's regeneration, this makes them very resilient to damage.
 * Hacking Tools: Nagurun's hands can morph into hacking tools for Damemaru to use.
 * Flight: While in backpack form, Nagurun can be used as a jetpack. If Damemaru is incapacitated, Nagurun can still fly by itself.
 * Limited Telepathy: Nagurun and Damemaru can share their thoughts, but only with eachother. It seems this also means Nagurun can speak within Dazuma's world despite being normally mute.