Rim

Rimu/Rim. Is one of the few protagonists of The Dungeon of Black Company.

Rim is an immensely powerful Majin, where the magic of the dungeon circulates. She later join The Main Protagonist, Ninomiya Kinji, on their adventures filled with various things to discover

Appearance
Dragon: She appears to be a terrifying dragon that is tremendous in size with magenta-scales covering her body, Glowing-green eyes with black as its pupil, and Ivory colored horns covering her head like a helm.

Humanoid [Teen]: She appears to have a body similar of that a normal teenage girl. With features of; Fair skin complexion, emerald eyes with red pupils, long pink-hair, a pair of magenta-horns, magenta scales covering her four limbs and private parts, and a soft-cute voice. She possesses a worn out cloth given by Kinji that is covering her entire body.

Humanoid [Adult]: She appears to have a well-developed body and much more fierce appearance with the same features as her teen one.

Personality
As a Majin, Rim was supposedly to have no heart to fill with emotion. However, Rim held a strange trait that made her desire food to eat. The Queen Ant calling her a gluttonous dragon even though Shira states monsters don't need to eat food. Later on, during her encounter with Kinji and an effeminate boy later known as Ranga, Rim would experience various things that are not found inside the Dungeon; tasty foods, new sceneries, fancy clothes and friends.

For the early parts of the series, Rim was considerably selfish and conquered by her desire to eat. Having abandoned her duties as a Majin simply to experience the outside world with little regard for the consequences. Only aiding Kinji whenever he promised her food and little else. Over time, however, Rim would slowly develop care and understanding towards others.

As a result, despite being a Gluttonous Dragon that usually cares about nothing but her belly, she learned to protect and take care of others, as seen when she rescued her little sister, Sky, from the brink of collapsing due to the abnormalities in the dungeon. Growing to even appreciate Kinji and those gathered with him as her friends, enjoying the days with them to the point of being willing to defend them if needed.

Her little sister (the Demon Lord) claims that she is very stupid. Her lack of social understanding and the outside world also made her fooled in eating trash. Rim also becomes a NEET as Kinji originally desired and only sleeps and eats after he became very successful in his business'.

Plot
The Hungered Rim, spotted Kinji and Wanibe in the lower level of the dungeon. However, the two managed to conceal themselves before being targeted. Kinji pushed Wanibe as a bait for him to escape, which Rim took quickly. Wanibe who is about to be eaten, desperately request for Kinji's help,

Kinji came back with a proposal- a deal with Rim, tempting her that he will give her foods far greater than things in the dungeon, in exchange, she will help him as a repellant for monsters when they are mining demonites. Rim find it amusing hence having their contract sealed.

Kinji Ninomiya
Originally, Rim would only see Kinji as a means to taste new foods. Having considered him interesting, she left the dungeon to join him but under threat she would devour him if he failed in filling her belly. Only aiding him whenever he promised her food and little else. Not even caring of the debt she placed him under as she freeloaded under him. As the series continued on, Rim would slowly become attached to Kinji and became less selfish towards him.

Helping him out during his schemes, reluctantly listening to him to a degree whenever they bathed together, and defending him from monstrous threats, even if he does bribe her with food for obedience. Even so, the two would slowly become inseparable with Rim admitting that she began having fun with Kinji. Willing to even ask for his help when she discovered her sister, Rim, was sick.

As a result, upon Kinji being attacked by an unknown observer, Rim became angered. More so when, during the events that led her petrified and shattered, upon her revival and realizing Kinji had been fatally wounded by the observer, Rim became enraged and viscously attacked the observer in response. Willing to then share some of her excess flesh and power to revive Kinji as he had become someone irreplaceable to her.

Sky
For the most part, Rim had no idea Sky was her sister. When fist meeting, Rim realized Sky was a Majin like her and had been born to replace her after Rim abandoned her duties. Even so, Rim was willing to kill Sky and bit off her head.

However, when travelling into the future with Kinji, Rim would discover the Demon Lord of the future was the same Majin and as she discovered, her younger sister. Feeling guilty for placing a burden on her sister, Rim promised Sky she would find the past version of her and help her out and give her a name. Keeping her word when Rim and the others discovered Sky in the lower levels. To make amends, Rim would do her best to heal Sky when realizing because of her selfish actions of leaving the dungeon, Sky had been born incomplete and weak; asking Kinji for help and reconciling with the younger Sky who previously hated her for their past battle.

After Kinji's success in society, while the two's relationship is still strong, Rim considers Sky to be too strict due to the latter's desire for Rim to manage the dungeon and think beyond food.