Takeru "T.K." Takaishi

Takeru Takahaishi is a character in the anime and manga Digimon. He is frequently referred to by his nickname, "T.K.", in the English anime. He's the partnered to Patamon & is the younger brother of Yamato Ishida.

Prelude to Digimon Adventure
He witnessed the Greymon/Parrotmon fight.

Digimon 02
T.K. grew alot during the last years. He is a member of the 02 DigiDestined team.

Digimon 02: Series Finale epilogue
By the year 2027, Takeru became a author. He wrote various stories based on the adventures he and the other children had.