Jack

"Commander" Jack is a member within Kingdom Organization.

Intruder In Rakshasa Street Arc
Jack is introduced sat down on a throne telling Kelly, Norah and Gavin it's been a long time and questions their days being Requiem Generals. When Norah asks why he wished to meet just three of them, he stands up and replies if he summoned everyone at once, they may attract unwanted attention. Claiming the King and Queen won't be making an appearance. After his introduction he informs Kelly of his brothers death in Rakshasa Street, and blames Cao Yan Bing. Telling the knights of several obstacles in their path to rule the Human World and Spirit World.

Quotes
"We already the sacred weapon Kronos in our hands, the only thing left to obtain is the Divine Pearl of Xihe."