- "You guys are in the wrong place at the right time, heh heh heh."
- — Hayato —
Hayato appears as a boy with spiky red hair. His character is dressed in yellow armor, and his face is decorated with wave symbols. The large spear he carries on his back identifies him as a Long Arm.
Despite his childish appearance, Hayato is actually a very skilled hacker. He has the ability to create and control powerful Data Bugs, and is also skilled at creating disguises. However he can still act like a kid and displays several childish traits, like being afraid of girls. Out of all of the hackers he is the least ruthless, and occasionally questions his actions. Along with the other hackers he has made contact with the Wandering A.I. Morti.
Working with his friends to create a concept of true death in The World, Hayato was shown by Morti how to alter the data of monsters so that players killed by them would be fooled into believing they had died. With Morti's guidance Hayato created a special field in a blocked off server where the unconscious PC bodies of these players could be stored.
After realizing that Shugo posed a threat to their plans, the Hayato and the other hackers decided to delete him for good. After the successful capture of Rena Hayato created a Data Bug and placed it into a copy of her PC Body. He tried to use this fake Rena to lure Shugo and his party into a trap but was unsuccessful. Later he was sent to investigate some disturbances in the field where the coma victims were being stored. Entering the area he found that Rena had been awakened by Aura and was able to alert his friends in time to keep her from doing too much damage. Following orders from Katsuyuki, who had contacted Morti he strengthened the protection around their prison field to block Aura out.
When Shugo and the Cobalt Knights attacked the hackers' base in Naval Monte Hayato fought against them using his Data Bugs. When Michi summoned her friend, the Wandering A.I. Morti Hayato expected an easy victory. However to his surprise Morti turned on him and placed him into a coma along with the Knights.