Renji is your friend whom you met and learnt that they had held a secret power at the cost of their humanity everytime. Renji can transform into a chainsaw-hybrid monster who can tear anything apart with its chainsaws on its head or arms. While it seems cool, Renji can’t maintain her humanity during that form so it’s more of a double-edged sword. With the pull of a chord from Renji’s chest, she can turn into said chainsaw-hybrid monster.