Pondus is a Legacy which allows the member of the Garde who possesses it to alter their molecular density. This can allow them to become impenetrable, phase through objects or even walk on the surface of any body of water as easily as they could on solid ground.
Kopano develops this Legacy not long after he develops Telekinesis. Originally, he is only able to increase his body's density to become hard as stone, triggered by an attack during one of his father's deliveries. This leads Malcolm Goode to believe Kopano has the Legacy of Impenetrable Skin. However, Kopano Okeke develops the other side of his Legacy when he phases through handcuffs restraining him and ice on the surface of a frozen lake to save Nigel from drowning.
Has the legacy Ximic (like Number Four) which allows him to copy any legacy that he has observed.