David Ito portrayed in all nine episodes of Hana Yori Dango and ten episodes of Hana Yori Dango Returns. As Kaede's secretary, he appeared in every episode that she appeared in. In the episode eight of Hana Yori Dango, Nishida tells Tsukasa that sometimes Mrs. Domyoji frightens him and he clearly admires Tsukushi Makino for standing up to her. Throughout the second season, Nishida voices his support for Tsukasa several times, including the time he gives news to him that Tsukushi is in the hospital. His clear support for Tsukasa and Tsukushi, possibly lead to his dismissal from Domyoji Group. Tsukasa later makes Nishida his own private secretary.
David Ito returned to play Nishida in Hana Yori Dango Final. In the film, Nishida is still working as Tsukasa's secretary. He announces Tsukasa and Tsukushi's wedding at the beginning, and attends the event in the end.