A demon weapon and Enchanter who sides with anyone he feels will help him quell his insatiable bloodlust. His weapon form is a chainsaw, though he can produce a chain around his limbs to fight in his human form. As an Enchanter, he can create and control golems, which can also wield him in his weapon form. He is initially an ally of Arachne, having created the first golem to hide her soul in 800 years in the past, and using his Enchanter powers to pass his memories down to his children for thirty generations under the name Saw until Arachne's eventual return. Upon Arachne's defeat, Giriko joins forces with Noah. He prefers not to fight with a meister, and hates DWMA for promoting meister/weapon pairings. He is also a rival of Justin Law and tends to argue with him, even when they become allies under Noah. In the anime, he is ultimately abandoned by Arachnophobia after Arachne's death and swears revenge against Justin.