The Roppongi Twins are villainous twin sisters from the Dreamtales Comics story The Roppongi Twins.
They alter people's sizes and enjoy the chaos that comes with it.
The twins first appear at a subway and start changing people's sizes which causes panic and chaos with people fleeing for their lives. At one point they enjoy toying with a small woman called Suzy and one twin attempts to crush her to death under her boots, but gets stopped by the heroine.
The twins continue to alter people's sizes throughout the story and their chaos eventually ends when they themselves end up being shrunk down to a small size.