Pulx

Hayato's ARMS is called White Knight (or just Knight), and is concentrated in his left arm. The Knight seems to be the manifestation of Alice's will to protect. Hayato's arm transforms into multiple fighting blades and a projectile launcher for close combat. The blades produced by the Knight are supposedly the hardest substance that an ARMS can produce, however this seems to be influenced to some degree by the emotional state and skill level of Hayato. The Knight's nano-machines allow Hayato to heal injuries much faster than a normal human even in his untransformed state. White Knight's ultimate form is a powerful armored knight whose lance, the "Lance of Mistilteinn", can destroy other ARMS with an Anti-ARMS Nano-Virus, and as such, it negates the regenerative property of ARMS. During his final fight against Kou Karunagi, the knight develops the ability to allow Hayato to enter into a half-transformed state where the ARMS nano-machines spread throughout his entire body and dramatically increase all of his physical attributes (similar to the half-transformation shown by Ryo Takatsuki). In his fight against Keith Violet the Knight's Lance of Mistilteinn evolved into a vastly more powerful form. It is now a double pointed energy lance that is able to destroy ARMS nano-machines by projecting an intense energy field with every swing and was able to instantly disable Violet's Evil Eye of Balor. White Knight's secret mission is to destroy Jabberwock if it gets completely out of control, and Hayato does not want to be his best friend's executioner.Ryo Takatsuki is the main protagonist in the anime and manga series Project ARMS, created by Kyoichi Nanatsuki and Ryoji Minagawa. He is considered more or less the most powerful and dangerous member of the ARMS Kids having the power of the Jabberwock.

Ryo's ARMS is code named Jabberwock, and is concentrated mostly in Ryo's right arm. The Jabberwock AI program is a demonic entity which only lives to destroy and is the manifestation of Alice's hate towards humanity (an unexpected side effect of this is that Ryo and the Jabberwock often feed and reinforce each others anger, which allows them to synchronize with each other more easily, making them more powerful). Most of the time Ryo keeps Jabberwock under control, but when Ryo is in danger or becomes overstressed Jabberwock can take over. Then Ryo transforms into Jabberwock's ultimate form, and the carnage begins. Only Ryo's fellow ARMS can bring him back under control (most effectively by the Queen of Hearts, the others have to beat him into submission)