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Gerão Gregorio Ribeira von Hesse, more commonly known as Grego, was a physicist on the planet of Lusitania.[1] He was first introduced in Speaker for the Dead.


Speaker for the Dead

Grego was only six years old when Andrew Wiggin arrived on Lusitania. As a child, he showed a disturbing capacity for destruction, modeled on his "father" Marcos Maria Ribeira's habit of domestic violence, a temper which did not subside during later years.[2]


After Quim's death, he whipped a mob into a frenzy to attack the Pequenino forest responsible, only to have the mob attack the nearest one at hand—Human and Rooter's forest. After being chewed out by Valentine Wiggin, Grego tried to end the massacre with as little bloodshed as possible, eventually placing himself between the surviving Pequeninos and his own riot. He later collaborated with Olhado on faster-than-light travel.[1]





  1. 1.0 1.1 Xenocide
  2. Speaker for the Dead
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