Takeru Takaishi, often referred to as T.K., is a fictional character from the Digimon franchise. He is one of the main characters in the series, known for his kind-hearted nature and strong sense of justice. T.K. is the younger brother of Yamato Ishida and is partnered with the Digimon Patamon, who can evolve into the powerful Angemon. In the series, T.K. is portrayed as brave and optimistic, often providing support to his friends during their adventures. He plays a significant role in the Digimon Adventure series and its sequels, showcasing his growth and development as a character throughout the storyline.