Abare Killer's personal weapon. It looks like a quill. The Wing Pentact has the two modes: Tact Mode and Blade Mode:
In Tact Mode, AbareKiller can use it like a pen to create constructs of energy such as laser arrows, chains, nets and barrels. He can use it to construct 'X' symbols on his enemies chest, before detonating them.
In Blade Mode, he can use it to attack opponents directly using the Pentact as a sword or to fire a laser beam from the pommel and can use it as a conductor's baton to mind control other Bakuryu. He can also use it to teleport and make a 'Z' shape slash attack called Final Letter.