Sure, here are five potential names for the Nen ability that manipulates gravity:

Neutron Pull: referencing the strong force that holds the atomic nucleus together.
Weightless Wonder: emphasizing the feeling of being weightless and the control over gravity.
G-Force Gripper: alluding to the force felt during acceleration or deceleration.
Orbital Odyssey: referencing the movement of celestial bodies in space, where gravity is a major force.
Gravity's Grasp: emphasizing the control and mastery over gravity.
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