Matoi Ryuuko's primary weapon in Kill la Kill. She wields half of a pair of scissors capable of cutting apart Goku Uniforms. The Scissor Blade can shrink into a regular-sized scissor half, or morph itself via mechanical joints into a much larger version that Ryuuko uses to fight, which is called Decapitation Mode.
The other half is with the person responsible for murdering Ryuuko's father. She battles Kiryuuin Satsuki and her minions to find out who owns the missing Scissor Blade.