Fernobelia is a deity who appears in the second season of the anime. He is specifically known as the god of magic and academics, a role that defines his interests and his interactions with the mortal world and its inhabitants.

In terms of appearance, Fernobelia is described as a thin older man, which aligns with his wise and scholarly disposition. Personality-wise, he can come across as somewhat aloof, blunt, and even a little rude. This is evident when he first summons the protagonist, Ryoma Takebayashi, abruptly taking his consciousness without waiting for a formal prayer or invitation. Fernobelia possesses a naturally cautious and wary nature, particularly regarding individuals who have been transported from another world. This stems from his observation that some otherworlders have become corrupted by the immense power they receive, misusing their abilities and causing problems. Despite this initial wariness and his sometimes gruff exterior, he is not unkind. He is shown to be fair and genuinely appreciates effort, creativity, and a sincere academic spirit. The other gods note that he is behaving in an unusually considerate manner with Ryoma, with one going so far as to jokingly call him a "tsundere" for his gruff but caring behavior.

Fernobelia's primary motivation is to oversee and safeguard the magical and academic integrity of his world. He takes his duty of assessing new otherworlders seriously, wanting to ensure they will not become a threat. In Ryoma's case, he personally evaluates the boy's character and intentions. Furthermore, he is deeply interested in the study and application of magic, especially innovative uses that could have long-term positive effects. He encourages the pursuit of knowledge and the responsible development of new magical techniques.

Within the story, Fernobelia plays a supporting role as one of the divine beings who watch over the protagonist. After summoning Ryoma to the gods' realm for his assessment and finding him satisfactory, Fernobelia takes a liking to him, leading to what appears to be the beginning of a more direct and ongoing interest in his activities. He serves as a source of key information and guidance regarding magic, particularly concerning a unique spell Ryoma develops using his tamed slimes. He explains the potential risks and benefits of this new magic, including its possible positive effect on the world's magical energy and the potential consequences for the slimes involved.

A key relationship for Fernobelia is with his fellow deities, such as Tekun (the god of technology and craftsmanship), Kufo, and Gain, with whom he frequently interacts and discusses the progress of the humans they watch over. He also develops a significant, if formal, relationship with Ryoma. He is impressed by Ryoma's respectful nature, his dedication to research, and his creative applications of magic, which sets him apart from other otherworlders Fernobelia has encountered.

As for his development, Fernobelia begins as a distant and untrusting god, but through his interactions with Ryoma, he is shown to soften slightly, with his appreciation for the boy's academic curiosity allowing his more favorable qualities to surface. The character is also a source of some humor among the gods, as his uncharacteristic behavior around Ryoma becomes a topic of lighthearted teasing from his peers.

Fernobelia possesses notable abilities befitting his station. Like all gods in this world, he can read the hearts and intentions of others. However, his proficiency in this area is particularly advanced; his scans are much more accurate and allow him to glimpse any and all knowledge a person possesses when he questions them. He also wields immense magical power and has the authority to summon a person's consciousness from the mortal world into the realm of the gods.