It’s no secret that out of all the sisters, Two is the physically strongest. Given, all Intoner’s have a reasonable amount of human strength, but what separates the peppy cerulean goddess from the others happens to be the fact that her muscle tissue is constantly growing and evolving.
Every Intoner has a part of their body that consistently grows or sharpens with time and age; One’s hyper-awareness, Three’s hair, Four’s nails and Five’s breasts. Each of these characteristic are ever growing pieces of themselves, and each sister has learned to live with this annoying trait; Three cutting her hair, Four biting her nails and Five… well, Five doesn’t really deal with her big breasts, she gloats about them.
Two, however, being the strongest means the smallest action has a tendency to hurt her sisters and nearly kill humans. A practiced art was her concentrating carefully when not only interacting with people, but objects. On rare occasions Two will rip a door from its hinges with little effort at all, or break a persons hand by merely grasping it.
Because of her strength, she exercises will-power to control how fast she touches something, brushes against someone, and is mindful not to bump into anyone ( despite her being a terrible klutz ). And this was well in true while she was normal, but shattered and heart-broken Two has forgotten how to restrain her impulsive actions; and this is dangerous not only for her Disciple and sisters, but especially for humans.
With Two no longer restraining her strength, anything and everything can be a potential death sentence for anyone around her. Especially sex; A Disciple can withstand the strength and power of an Intoner, and Cent seems to be the only one Two will regain some consciousness enough to not hurt him during it, but unfortunately this does not extend to random one-night-stands.
If chosen to have sex with Two ( which her itch needs scratching badly ), its likely her partner will be killed from either having their hips smashed in, bones breaking, and bleeding out, or Two throwing a sudden outburst of angry emotions. These seem random, and come and go just as quickly.