Hikaru and Kaoru are identical twins that always keep to themselves. They don't talk to anyone but each other and when someone else decides to talk to them they're arrogant, and rude and see everyone else as a different world. They treat others as toys to be played with. They crave someone to differentiate between them but they make it almost impossible to do so. Hikaru is more emotional and Kaoru is more logical. They want to be entertained and when someone fails they distance themselves.