Who is Wambui from A Grain of Wheat and what is their importance? A_Grain_of_Wheat English & Literature Wambui | A Grain of Wheat

Wambui is an older, toothless woman in Thabai. During the rebellion, she carries messages for the rebels. She is reputed to have been transporting a pistol when government guards came to search everyone and escaped by hiding the pistol between her legs and shaming the guard who tried to search her.