Hajime Nagumo: 17 years old. Job: Synergist. In the abyss, his hair turned white and he gained a prosthetic arm and eye, acquiring abilities by eating monster meat. He transmutes artifacts modeled after modern weaponry and fights with dual pistols in a self-taught Gun-Kata style. Cold and arrogant, but values honor and shows deep affection for his "Special" ones like Yue. His goal is to return home. Because he is a rationalist and cautious, he is cold to others. Even after becoming allies, he remains cold for a long time.

Yue: Former Queen of the Vampire Race. Actual age is 323, but looks like a young girl. Blonde hair and red eyes, cool and daring. Possesses all-element magic, automatic regeneration, and mana recovery through blood; specializes in Gravity Magic. She is Hajime's one and only "Special" and lover. She accepts Shea and the others like family.

Shea Haulia: A 16-year-old Rabbitman. Bluish-white hair, a cheerful and pushy "Useless Rabbit." Job: Diviner, born with Future Sight and mana manipulation. A melee fighter using the artifact "Drucken," she is a "Bugged Rabbit" who keeps breaking her limits. She joined the journey out of pure affection for Hajime and was eventually recognized as a "Special."

Tio Klarus: A 563-year-old Dragonman princess. Black hair and gold eyes, an intellectual wearing a black kimono. Job: Guardian. Uses Dragonification, breath attacks, Fire/Wind/Thunder magic, and Pain Conversion. She calls Hajime "Master" and holds loyalty toward him along with a strange masochistic streak. Her ultimate technique, "Dragon God Manifestation," turns her into a giant black dragon.

Kaori Shirasaki: 17 years old, Hajime's classmate and the school idol. Job: Healer. Kind to everyone and headstrong once she decides on something. She has liked Hajime since middle school, believed he survived the abyss, and confessed after reuniting. She has high aptitude for Restoration Magic and later gains the power of an Apostle by anchoring her soul into Noint's body.

Shizuku Yaegashi: Kaori's best friend. Long ponytail, 172cm. A swordswoman inheriting the ancient Yaegashi style; her job is also Swordswoman. A dignified realist but a maiden who loves cute things. She recognized Hajime's mental strength and realized her own feelings in the Ice and Snow Caverns. She also plays the role of stopping Kouki's rampages.

Aiko Hatayama: A 25-year-old social studies teacher. Small stature with a baby face, beloved by students as "Ai-chan." Job: Farmer. Called the "Goddess of Fertility" for her agricultural improvements. She lectured Hajime on his way of life in Ur, becoming the catalyst for him to regain his kindness. After conquering the Divine Mountain, she resolved to live bearing her sins and developed feelings for Hajime.

Myuu: A 4-year-old Dagon girl. Rescued by Hajime's group from kidnappers, she calls Hajime "Papa." She ends her sentences with "~nano." Even after reuniting with her mother Remia, she continues to adore Hajime, serving as the anchor that prevents him from turning completely cold-hearted.

Liliana S. B. Heiligh: Princess of the Kingdom of Heiligh. 14 years old, blonde hair and blue eyes, nicknamed Lily. A kind person who cares for her summoned classmates. After the invasion of the royal capital, she works toward rebuilding the kingdom and negotiating with the Empire. She serves as the commander-in-chief of the human forces in the final battle.

Others: Aiko Hatayama, Suzu Taniguchi, Kouki Amanogawa, Ryutarou Sakagami, Kousuke Endou, Daisuke Hiyama, Yukitoshi Shimizu, Yuka Sonobe, Jugo Nagayama, Kentarou Nomura, Ayako Tsuji, Mao Yoshino, Nana Miyazaki, Taeko Sugawara, Noboru Aikawa, Akito Nimura, Atsushi Tamai, Yuya Suzuki, Nao Arakawa, Shota Mori, Mei Fujimoto, Sakura Aizawa, Rika Miura, Kana Yokoyama, Shiori Mizushima, Kotone Hoshino, Remia, Meld Loggins, Ilwa Chang, Gahard D. Hoelscher, Altena, Cam, Pal, Nea, Lana, Miledi Reisen, Oscar Orcus, Naiz Gruen, Meiru Melusine, Laus Barn, Luteilis Haltina, Vandal Schnee, Berta Liebre, Noint, Erst, Ishtar Langobard, Freid Bagwa, Cattleya, Mikhail, Reis, Dinreed, Ehit, Alve, Lanzi, Bize, Sarze, Will Kudeta.