Kyuuichirou Kizaki is Kaoru Hanayama's dedicated bodyguard and primary spokesperson, routinely managing communication duties. He holds the position of second chairman within the Hanayama Group, serving directly as Hanayama's chief subordinate. Kizaki's long-standing connection to the organization stems from a past friendship with Hanayama's father. Having personally witnessed Hanayama's formidable strength, Kizaki possesses unwavering confidence in his leader's capabilities. Kizaki demonstrates profound loyalty and deep respect toward Hanayama, remaining consistently at his side. He prioritizes Hanayama's safety above all else, willingly undertaking significant personal sacrifice. This protective drive leads him to proactively confront extreme threats, such as attacking Yuujirou Hanma during the initial manga series to shield Hanayama, and later facing Pickle under similarly dangerous circumstances in the third series. His character is defined by this role as protector and loyal subordinate within the Hanayama Group structure.