Arata


 * For the original version, see Arata Kagami

Arata is an agent of ZECT under Otogiri who uses the Gatack Zecter to transform into Kamen Rider Gatack. He is the only member of Otogiri's group to support Kabuto, and attempts to defend him. But when he sees Otogiri with Mayu, he attempts to reason with him before he is attacked by ZECTroopers, escaping them to call Tsukasa Kadoya and the others for help as he learns that he and ZECT are being played by Otogiri.