Kugaha (陸巴) was one of Bishamonten's former Shinki who conspired against her. He worked under the guise of a doctor while attempting to poison first her Regalia and ultimately, her. Upon being discovered, he was exiled and stripped of his name. He was later reluctantly adopted by Tenjin for investigatory purposes and given the name "Saku" (斯). He is a stray, also belonging to Yato's Father under the name "Edachi" (役).
As Bishamon's Shinki, Kugaha took the form of a set of balance scales, under which he was called Rokki (陸器).
Kugaha appears to be in his late twenties, he has dark skin and light gray hair. He is normally seen wearing blue pants, a gray poncho, a few bracelets made of thread on his right arm, and has an anklet of similar make on his left ankle. He also wears a blue headband, and a decorative thread hangs off one side.
Although shown to be a caring and helpful Shinki at first, searching for herbs to heal his ill master, Kugaha quickly showed his cunning and manipulative personality when he tricked Kazuma into revealing his assistance of Yato and forcing Bishamonten to exile him. Later on, he was shown plotting to kill the current Bishamonten using Yato, who he already tricked into believing that Bishamonten has kidnapped Hiyori, and planning to control the newly-incarnated Bishamonten and moulding her into "the god of war that she should be".
Kugaha is also shown to be a hypocrite, due to his belief that Bishamon was weakened by having so many Regalias not fit for combat, yet at the same time believed himself to be worthy of her exemplar despite the fact he was a scale in his weapon form. Yato compared him to a spoiled child trying to kill his parents and that the reason for his actions basically moulded down to "Pay more attention to me, Mommy." However, In Bishamon's eyes, he was simply doing what he believed to be the right thing to do and that he acted righteously. However, this did not stop her from revoking his name and banishing him, during which he claimed to care more for her than anyone else did, showing truly how hypocritical he is.