Gravitikinesis is the power to manipulate gravitational forces by which all physical bodies attract each other, and gravitons, a elementary particles that mediate the force of gravitation. User can bend gravity to make the environment very heavy or light, cause objects to fall toward another object instead of the earth, flatten objects, and generate miniature black holes to compress objects into oblivion. They can repel and attract matter and energy regardless of its mass or move objects in a manner similar to telekinesis. Offensive uses of this power include repulsing people or objects with such force to shatter practically anything, increasing gravity to crush or immobilize opponents, decreasing it to render them defenseless, or surrounding one's body in a gravitational field to amplify physical strength. Defensive uses include creating a gravitational force-field to repel all manner of attacks or anchoring oneself to the ground.
For a full list of characters who can control gravity, see here.