Takeru "T.K." Takaishi (高石 タケル, Takaishi Takeru?) is a character in the anime and manga series Digimon Adventure and Digimon Adventure 02. T.K. was voiced by Hiroko Konishi (Adventure) and Taisuke Yamamoto (Adventure 02), while Wendee Lee and Doug Erholtz provided the English voices for him in the two series respectively.

T.K., the younger brother of Matt Ishida, is partnered with Patamon. T.K. was too young to remember his parents' divorce clearly so he is not as affected by it as much as Matt. TK is glad when he gets to see his dad and he doesn't mind living with his mom. He is the Bearer of the Crest of Hope.

Source: Wikipedia