Aragane Twins

The Aragane Twins a pair of young, twin novice ninjas who are members of the Oboro Clan and minor heroes in the 2002 videogame Shinobi. both Akagane Aragane (the female) and Shirogane Aragane (the male) form a fearsome duo. Both wield scythes called kusarigama, but each uses completely different attack methods.

History
The 2 children who are brother and sister, were Hotsuma's bright young students training under his wing for long until he left the clan. They kept their faith in their mentor, hoping that he will come back.

A year later, the Oboro Clan were attacked by an old enemy of theirs known as Hiruko Ubusuna who used his dark magic and the summoned legions of Hellspawn demons to slaughter and later possessed the ninjas including the Aragane Twins one by one.

They both ask Hotsuma to kill them, knowing that if they are left alone, they will end up hurting innocent people. Despite Hiruko's control over them, they show great respect to Hotsuma by calling him "Master" (senpei). In the end, they are both defeated by Hotsuma and are given the death they asked for as their souls were freed from their torment.