This is a list of characters appearing in the novel series , written by Okina Baba and illustrated by Tsukasa Kiryu, and its anime and manga adaptations.
Main White /
Nicknamed "Kumoko" by the fandom. She reincarnated as an initially "Nameless" spider monster in the most dangerous dungeon in the world, where she constantly fights to survive and slowly evolves into a powerful being, becoming known as the "Nightmare of the Labyrinth". She eventually escapes the dungeon only to come into conflict with the Demon Lord, Ariel, before ultimately making peace with her, resulting in her becoming the morarch's subordinate. In the prolepsis, she has acquired a human form and serves as the commander of the 10th demon army. Initially implied to be the reincarnation of the classmate Hiiro Wakaba, she is later revealed to have actually been just an ordinary spider that happened to be in the classroom when everyone was reincarnated and was implanted with the real Wakaba's memories by D.
Ariel
The current "Demon Lord" and progenitor of all spider monsters in the world. Though physically a girl in her early teens, she is actually one of the oldest beings on the planet. She confronts White after she finally escapes the dungeon and tries to kill her due to the damage she was inflicting to the spider monster species' hive-mind. However, after multiple failed attempts, the two agree to a ceasefire and start traveling together, eventually putting their grievances aside and building a very strong grandmother-granddaughter relationship. In the prolepsis, she wages war against humanity and is generally viewed as a tyrant. However, her warmongering roughly began to make sense following the main story's revelation that the planet is dying, since the world's RPG system gathers the energy of people's skills upon their deaths to heal the planet.
Sophia /
One of the classmates, nicknamed "Vampy" by White. She reincarnated as a vampire born to human parents due to a mutation. She crossed paths with White when she was still a baby and was later taken in by her and Ariel after her home was destroyed in a war. Bullied in her previous life for being ugly with the mocking nickname "Rihoko", short for "Real Horror Girl" (Spooky in translations), she initially disliked everything and everyone associated with her past self, including White. However, over time, she developed a very close, sister-like relationship with her, to the point of becoming possessive. In the prolepsis, she offers manipulative assistance to fellow classmate Hugo and is later revealed to be an officer in the tenth demon army.
Wrath / /
One of the classmates, nicknamed "Mr. Oni" by White. He was reincarnated as a goblin. Having never liked the capitalistic modern world, he actually enjoyed the goblins' hunter-gatherer lifestyle. However, one day, his village was destroyed by humans and he was enslaved by them. After subsequently being abused by them, he broke free after unlocking his unique skill, which raises his stats tenfold at the cost of his sanity. He subsequently went on a rampage, evolving into an oni in the process. This continued until he crossed paths with White, who subsequently defeated him and deactivated his skill, after which he joined her group. In the prolepsis, he is the commander of the 8th Demon Army and is revealed to have been friends with Shun during their previous lives.
Merazophis
Sophia's butler, whom she has a one-sided crush on, nicknamed "Mera" by White. Her parents entrusted her to him when their home was destroyed in a war. However, they ended up being mortally injured whilst fleeing with her, forcing her to turn him into a vampire to save his life. Though struggling with his fading humanity, he continues to strive to protect his mistress. In the prolepsis, he is the commander of the 4th Demon Army and the arch-nemesis of the classmates Kunihiko and Asaka, having massacred their tribe. However, it is later revealed that this was retaliation for said tribe regularly raiding demon lands.
Gullie /
A god who takes on the form of a man dressed in black armor and the ruler of the dragons, nicknamed "Gulie" by White and Ariel. While concerned that the reincarnations might upset the world's balance, he has been ordered by his superior, D, not to interfere. He is also an old friend of Ariel and agrees to serve as the commander of the 9th Demon Army under her in the Prolepsis to keep an eye on her and White.
Ael, Sael, Riel & Fiel , , & Ariel's quartet of Puppet Taratects, small spider-type monsters that operate human-sized mannequins. Although initially enemies, they grow close with White after they start traveling together and she gave their mannequins a make-over, giving them an almost human-like appearance. Though incapable of speech, each still displays their own personal traits: Ael is the serious one, Sael the timid one, Riel the airheaded one, and Fiel the mischievous one.
D D / Ep 9 Ending Credit One of the classmates. She was initially implied to be White's past self and an otaku who was a victim of bullying. However, it is later revealed that she is actually a high-ranking god who was slacking off from her duties. She was the one who reincarnated her classmates after they were killed in an explosion, which was actually an attempt on her life by a previous Hero and Demon Lord, and created White by giving her memories to a random spider to make it seem like "Wakaba" had died, just to avoid being found and dragged back to work by her fellow gods. She is also the creator of the world's RPG system, which is a curse she placed on humanity after they nearly destroyed the world once, allowing them to develop energy in the form of skills that she takes back upon their deaths to slowly heal the planet. Throughout the story, she takes a more-or-less neutral stance, occasionally aiding White whilst also making the situations she finds herself in worse for her own entertainment.
Prolepsis While the storylines initially appeared to be concurrent, it is eventually revealed that the prolepsis actually takes place roughly fifteen years in the future, with the timelines gradually converging as the events of the main story catch up and elaborate on what was actually happening behind-the-scenes.
Shun /
One of the classmates, nicknamed "Shun" by his friends. He reincarnated as the fourth prince of the Analeit Kingdom. Having had a sheltered upbringing, he is very dense and naive. He later inherits the hero title following the death of his older brother, Julius, and has to flee his Kingdom after being framed for a coup d'état by his classmate, Hugo, and his older half-brother, Cylis. He subsequently embarks on a journey to the Elf Village to stop Hugo, who is wreaking havoc on the world, unaware that the elves are manipulating him in a shadow war against the demons and the church.
Katia /
One of the classmates and a member of Shun's party, nicknamed "Katia" by her friends. She reincarnated as a noblewoman in the Analeit Kingdom. She suffers from gender dysphoria due to having been a man in her previous life, though it is implied that he was Gay, which only grows more complicated when she starts developing romantic feelings for Shun. However, she ultimately resolves that her past self is dead and fully embraces her new gender.
Fei /
One of the classmates and a member of Shun's party, nicknamed "Fei" by her friends. She reincarnated as Shun's pet earth dragon and later evolved into a light dragon after he became the new hero, gaining a human form in the process. A bully in her previous life, she sees her current predicament as karmic punishment and vows to better herself. Because of this, she was distraught upon learning one of her former victims, Wakaba, had supposedly died after reincarnating. This also leads her to be shocked upon crossing paths with White, mistaking her for Wakaba. After the timelines converge, however, she is the only classmate who deduces that White is not Wakaba's reincarnation.
Sue
The second princess of the Analeit Kingdom and Shun's younger half-sister, nicknamed "Sue" by her friends. She is a yandere with a brother complex, which is obvious to everyone except her brother. When Hugo overthrew Analeit, she was seemingly brainwashed and forced to assassinate her father while framing Shun. However, it is later revealed that she was actually not being controlled at all and willingly aided White out of fear. After the timelines converge, she betrays White and sides with Shun.
Ms. Oka /
The class' homeroom teacher and a member of Shun's party, nicknamed "Ms. Oka" by her students. She reincarnated as the daughter of the elf patriarch, Potimas. Using a unique skill that tells her the reincarnations' pasts, presents, and futures, she has been scouring the world for her students and securing them at the elf village. However, the skill comes with the caveat that she cannot freely talk about it, forcing her to keep secrets and causing those she wishes to protect to distrust her. Also, unbeknownst to her, she is being manipulated herself into gathering the reincarnations by Potimas, who is planning to experiment on them.
Hugo /
One of the classmates. He reincarnated as the crown prince of Renxandt Empire. Already egotistical in his previous life, his new royal upbringing turned him into a megalomaniac who tried to assassinate Shun out of jealousy for his popularity, but failed and got stripped of his skills by Ms. Oka. However, rather than realizing the error of his ways like she hoped, this prompted him to make a deal with the demons to overthrow the Analeit Kingdom and attack the Elf Village as revenge, only to end up being brainwashed by White into aiding her group in their shadow war against the elves before being cast aside once his usefulness had run out. After the timelines converge and the brainwashing gets undone, he finally escapes from his megalomania and becomes repentant of his previous actions.
Yuri /
One of the classmates. She reincarnated into a poor family who left her to the Word of God church, where she eventually became a Saint. Scared and alone, she clung to the only Japanese-speaking thing around her: the system voice of the world's RPG system. This, along with her upbringing, turned her into a religious fanatic. After the church starts aiding Hugo, she is brainwashed by him into joining his side as well.
Kunihiko
One of the classmates. He reincarnated in a nomadic tribe alongside his childhood friend Asaka, whom he had always had a crush on. However, one day, their village got destroyed by Merazophis, leaving them as the only survivors. Afterward, he became an adventurer to become stronger and get revenge. He and Asaka are eventually found by Filimøs and brought to the Elf Village, where they join Shun's party.
Asaka
One of the classmates. She reincarnated in a nomadic tribe that regularly raided demon lands alongside her childhood friend Kunihiko, whom she had always had a crush on. However, one day, their village got destroyed by Merazophis, leaving them as the only survivors. Afterward, she followed Kunihiko as he became an adventurer to watch over him. She and Kunihiko are eventually found by Filimøs and brought to the Elf Village, where they join Shun's party.
Sajin /
One of the classmates. He reincarnated as the son of a Word of God church black ops member and thus naturally became one himself as well, though his talkative personality clashes with his job. He aids Hugo due to the church allying itself with him.
Supporting Julius
The previous Hero as well as the second prince of the Analeit Kingdom and Shun's older brother, whom the latter greatly looked up to. He once faced White in the main storyline, set 15 years ago, which left him with mild arachnophobia. When war broke out between the humans and demons, he was killed by a mysterious girl in white later revealed to be White.
Hyrince