Nathan K — he can hold two souls in his body. If he dies, he loses one yet lives on with the other. As long as he replenishes his second soul, he cannot be killed. Nathan K is immortal.
THE FINAL SHOWDOWN
For years, Nathan has sought to be free. Free from the control of other Immortals, free from their manipulations of humans, free to help people, free to live. But getting that freedom has a price, and he always knew that meant facing the Immortal pulling all the strings — Larkin.
That time has finally come.