There are multiple characters named Gemma. For Gemma (Northern Saw-whet), see here. For Gemma from To Be a King, see here.
Gemma is a female Whiskered Screech Owl, or Megascops trichopsis. She is the one that created the GGE.
History[]
The Golden Tree[]
Gemma argues to the Parliament that the ember is too vulnerable while Coryn is away. Inevitably, she then creates the GGE (Guardians of the Guardians of the Ember) without the Parliament's full agreement. Later, she and two other owls, Elyan and Yeena, have their Elevation ceremony to become the leaders of the GGE. Nearer to the end, when the Band and Coryn come back, the trio and the three other GGE leaders (Felix, Humbert and Penfold) are sent to the Glauxian Brothers' and Sisters' retreats.