Frieren/History

Early Life
Approximately a millenium ago, Frieren was born and raised in an elven village, where she was notably the most powerful amongst the residents. She held a high concentration of mana and was left the sole survivor of an attack on her village led by Basalt the Throne, a general of the Demon King's army, whom she ultimately managed to defeat. After being rescued by the human mage Flamme, she was taken in as her apprentice.

Throughout her apprenticeship, Frieren was trained to forever conceal her mana like her master as a deception strategy against demons. As her mentor, Flamme was able to predict Frieren's future predicaments—such as her desire to understand humans on a deeper level—and made preparations to guide her a thousand years in advance.

At some point, Flamme brought Frieren to meet Serie, another elf and Flamme's former master. Although Serie voiced her approval with her strength, she was disappointed by Frieren's devotion towards the pursuit of magic when given the opportunity to receive any grimoire she desired. However, Flamme assured Frieren would become capable of defeating the Demon King and bringing about a peaceful era, even when Serie couldn't.

Frieren remained Flamme's apprentice until she passed away from old age nearly half a century later. Prior to this, Flamme entrusted Frieren to defeat the Demon King and taught her her favorite magic: flower bed magic. Upon her death, Frieren performed this magic to respect her master's final wish of growing a flower bed around her grave.

Afterwards, Frieren adventured solo across the country and continued pursuing various forms of magic. During this time, she met a young Himmel after he had gotten lost in the woods and showed him her master's flower bed magic. Although Frieren herself did not recall the encounter, this memory left a major impression on Himmel and would lead his grown-up self to search for and recruit Frieren for the Hero Party, ultimately formed to defeat the Demon King.

Beyond Journey's End Arc
After at least 900 years of life, Frieren was recruited by the Hero Himmel and joined the Hero Party as its Mage, where they journeyed alongside Priest Heiter and Warrior Eisen to the Demon King's Castle in Ende in order to defeat the Demon King. Ten years later, after managing to defeat the Demon King and his army, the Hero Party returned to the Royal Capital and watched the Era Meteors together, disbanding with the promise of seeing the meteors together again in 50 years.

Afterwards, Frieren planned to explore the central provinces for a century, and she continued to journey around whilst acquiring magic. After 50 years passed, Frieren reunited with Himmel, Heiter, and Eisen in order to see the meteors together as promised. Soon after, Himmel passed away and she attended his funeral. During the procession, Frieren broke into tears and voiced her regret over not getting to know him more given the length of a human's lifespan. Influenced by this event, she continued on her journey to pursue magic with the intention of also learning and understanding humans more.

Twenty years after Himmel's passing, Frieren sought out Heiter in the outskirts of the Holy City Strahl and stumbled across a young girl named Fern, whom Heiter had saved. When Heiter requested that Frieren make Fern—a mage-in-training—her apprentice, she refused, citing the high death rate of mage apprentices on the battlefield. However, Heiter then requested that she decipher a grimoire on resurrection and immortality while training Fern in her free time, to which she agreed. After five to six years, she had inadvertently ended up training Fern to a point where she was no less capable than an adult, and acknowledging Heiter's scheme, she finally agreed to take on Fern as her apprentice. After Heiter passed, she and Fern visited his grave before setting off on their journey together.