Tarō Nanba

Tarō Nanba (難波 太郎, Nanba Tarō), frequently nicknamed Ta-kun is an orphan living in the Mother's Village orphanage. He owns the Apprentice Diary, the "Copy Diary".

History
Ta-kun was born in the orphanage. He grew up in the company of Kamado Ueshita, Orin Miyashiro, Marco Ikusaba, and later, Ai Mikami.

Ta-kun spied on the Kosaka Mansion when Kamado's forces invaded the mansion to kill Yuki and Yuno. He played a role in setting off the explosives in Sakurami Tower, which destroyed the tower and inadvertently killed Marco Ikusaba and Ai Mikami.

After Kamado made an alliance with Yukiteru Amano and Yuno Gasai, Ta-kun, Orin Miyashiro and around twenty other orphans ambushed the Eleventh John Balks on a mountain road. Ta-kun stood next to Kamado, monitoring the fighting and Yukiteru, whom he feared was up to something. However, John Balks disables their apprentice diaries with a signal jammer in his car, and thus removing the powers the orphans had. At this moment, Ta-kun notices Yukiteru running away from the fight with Balks' forces. Ta-kun watched in horror as Yuno and Yuki betrayed their alliance, Yukiteru backstabbing the orphans by shooting them with a pistol while Yuno in turn kills Orin with her sword. Enraged, Ta-kun fights Yuno, calling them traitors. Yuno eventually stabs Ta-kun through the abdomen, his final words telling Kamado to run to safety before he died.

Third World
In the anime, Ta-kun and Orin, both with expressions of displeasure, stand in front of the orphanage to see off Kamado, who walks away arm-in-arm with John Balks.