Tetsuya Kajiwara

Tetsuya Kajiwara (梶原 哲也, Kajiwara Tetsuya) is Keisuke Yūki’s best friend who helps Keisuke solve the mysteries of The Universe of Four Gods. He is twenty years old and studying in college. While he appears fun-loving and carefree, he is serious, responsible, and reliable.

Tetsuya is initially sceptical of Keisuke’s claim that Miaka and Yui have gone into The Universe of Four Gods, but eventually believes his friend and helps Keisuke discover the true nature of the book. He is somewhat more intelligent than Keisuke and the two young men take turns reading the book in order for the story to progress. Tetsuya personally takes on the responsibility of reading the most difficult passages in the book to prevent Keisuke from discovering events such as Miaka nearly getting raped by claiming that nothing is happening and Miaka and her companions are only travelling about. As he reads, he falls in love with the tragic figure of Yui and expresses his love for her when she returns to the real world. They eventually begin dating and Tetsuya reveals the extent of his devotion to her such that he would enter the book to save Yui. They remain together even after Miaka and Taka marry.

Source: Wikipedia