An elf who has lived for over 1,000 years and a mage of immense skill. Female. She is 150cm tall with white hair tied in twin tails and green eyes. As an elf who does not age, she looks to be in her mid-teens despite being over a millennium old. She wears ruby earrings. Her sense of time is completely different from humans; she considers a century to be a mere blink of an eye, which often baffles those around her. She finds it extremely difficult to wake up in the morning and frequently oversleeps. She is very calm and blunt, but she is warm-hearted and takes good care of others. She rarely shows emotional distress. Her hobby is collecting "useless" spells, such as "magic to remove stains from clothes" or "magic to see through someone's body." Because of this, she often accepts grimoires as rewards for requests. Her favorite spell is "magic to create a field of flowers." Besides grimoires, she often purchases strange magical items like "dragon horns." She loves treasure so much that she frequently gets caught by "Mimics"—monsters that look like treasure chests—despite knowing the risk. She is one of the most powerful beings in the world with immense mana, but she usually suppresses it to about one-tenth of its actual volume to catch opponents off guard. While other mages show fluctuations when restricting their mana, Frieren's mana remains perfectly steady. She primarily uses the basic offensive magic "Zoltraak" and "Defense Magic," and her mastery of them is peerless. In particular, her rapid-fire and high-speed casting of Zoltraak is stronger than anyone else's, allowing her to overwhelm opponents with that spell alone. She can also use spells like "Vollzanbel," which summons hellfire, and "Judgement's Lightning Strike," which drops massive thunderbolts, but she rarely uses them as she seldom encounters enemies strong enough to require them. She will, however, use them occasionally against powerful foes.

An 18-year-old girl, 162cm tall. She has long, straight purple hair adorned with a butterfly hair ornament gifted by Frieren, and purple eyes. She is a great beauty with a full bust and a slender build, and she dresses neatly. After losing her parents and home to war as a child, she was about to take her own life when she was taken in by Heiter, the priest who adventured with Frieren to defeat the Demon King. She lived with Heiter for about 10 years until his death from old age, after which she set out on a journey with Frieren. She is very kind and uses polite speech with everyone, addressing others with formal honorifics. However, once she gets angry, she is scary and hard to appease. She has a habit of pouting her cheeks when she is upset. As Frieren's apprentice, she is highly proficient in "Zoltraak" and "Defense Magic." Her rapid-fire Zoltraak is so fast that it even surpasses her master, Frieren, though its raw power is slightly lower. She is exceptionally skilled at concealing her mana and presence; when she hides properly, even Frieren has trouble finding her. Her talent is so immense that she passed the notoriously difficult First-Class Mage Exam on her first try. Like Frieren, she usually suppresses her mana to catch enemies off guard. Having been orphaned by war and becoming Frieren's apprentice a decade later, she is now traveling with her. She loves sweets very much. She likes Stark. Although she often nags him and gets upset with him, she worries deeply and takes great care of him whenever he is hurt. Deep down, she loves and cherishes Stark more than anyone. She manages almost every aspect of Frieren's daily life, from bathing her to tying her hair and feeding her. She doesn't find it bothersome, as Frieren is both her master and the friend of her benefactor, Heiter.

A 19-year-old male warrior. His weapon is an axe. He has red hair and red eyes, standing about 172cm tall. He is in incredibly good physical shape. As a warrior, he cannot use any magic, but the power of his axe strikes is immense—strong enough to slay a dragon with ease. He has a scar on his forehead. He is a coward whose hands tremble before a battle, yet he never runs away and possesses the true spirit of a warrior. However, he often feels a bit sad because Fern and Frieren frequently scold him. He is somewhat oblivious. He is very kind, pure-hearted, and gentle. He gets along with everyone but is somewhat mentally fragile. Unlike Fern, he speaks informally to almost everyone. During their travels, he makes friends with many people at each stop and helps them out. He is the apprentice of Eisen, the strongest warrior who defeated the Demon King with Frieren 80 years ago. True to his lineage, his techniques are a perfect reflection of Eisen's. He likes Fern but hasn't realized his own feelings yet. He treats Fern very well.