Azusa Aizawa is the main protagonist of the light novel, anime, and manga series I've Been Killing Slimes for 300 Years and Maxed Out My Level (Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita), written by Kisetsu Morita. Her story ...
Azusa Aizawa is the main protagonist of the light novel, anime, and manga series I've Been Killing Slimes for 300 Years and Maxed Out My Level (Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita), written by Kisetsu Morita. Her story begins in a very unconventional way for an isekai heroine—through overwork. In her previous life, Azusa was a stressed-out office worker in modern Japan, who died from exhaustion. Upon being reincarnated into a fantasy world, she’s granted immortality and decides to take life at a slow, peaceful pace—swearing off workaholism forever.
To support her tranquil new lifestyle, Azusa takes up the simple task of killing low-level slimes every day. She does this daily for 300 years, and without realizing it, reaches the maximum level possible in her world—becoming the most powerful being in the land. Despite her strength, Azusa remains humble and peace-loving, preferring a quiet life in the highlands to fame or power. Her home becomes a haven for misfits and friends, and she slowly builds a found family of lovable and quirky characters.
Azusa's personality is defined by her nurturing and patient nature. She is protective of those she cares about and tries to avoid unnecessary conflict, though she will not hesitate to defend her family and friends when needed. As the series progresses, her calm demeanor and kind heart attract a wide array of companions—from dragons and demons to slimes and elves—many of whom come to her initially seeking a challenge, only to be won over by her warmth and wisdom.
Although Azusa initially wanted a quiet life, she gradually accepts that her home has become a place where adventures find her. Still, she faces every new situation with level-headedness and a touch of dry humor. She balances being an overpowered protagonist with a refreshing maturity, rarely flaunting her strength unless absolutely necessary. This combination of overwhelming power and motherly charm gives her a unique presence in the often action-heavy world of isekai.
Another notable aspect of Azusa’s character is how she challenges typical genre conventions. While many isekai heroes chase glory, revenge, or ambition, Azusa simply wants to protect her peaceful life and help others find happiness. This approach allows the story to blend fantasy, slice-of-life, and comedy in a wholesome way, with Azusa at the heart of it all.
Visually, Azusa has long blonde hair, blue eyes, and wears a black witch’s hat and robe, emphasizing her role as a magical figure. But despite the classic witch appearance, she’s far more approachable and down-to-earth than she seems.
In essence, Azusa Aizawa is a rare kind of protagonist—one who finds strength in kindness, peace in simplicity, and family in unexpected places. Her story is not about conquest, but about balance, healing, and the joy of building a gentle life after hardship.
