Tsurumaru Kuninaga is a character from the game and anime series 'Touken Ranbu'. He is a sword warrior known as a 'Touken Danshi', specifically a tachi sword spirit brought to life. Tsurumaru is portrayed as a playful and mischievous character who enjoys surprising others. Despite his whimsical nature, he is also wise and thoughtful, often reflecting on the meaning of life and existence. In the series, he plays an important role in battles against historical revisionists, ensuring the preservation of history while maintaining his lighthearted demeanor.