Avangani
The Avangani are a human ethnicity living in Zemirabel. Notably, they are very small (weighing 0.5lbs and being only 6 inches tall). As a result, they are very agile and able to jump, climb, and take falls that standard humans couldn't at an analogous scale. This also means that they are on the lower end of what is reasonable for a sapient being. Living in the rainforests of Zemirabel and having their small size, they build both vertical arboreal settlements and underground villages.
Culturally, they often get caught up in idealized, abstract versions of things, seeing reality as a corruption of that ideal rather than the ideal as a flawed model. They also often see geometry as the highest form of math. Interestingly, their mythology places rather large emphasis on the sizes of various mythological beings, likely influenced by historical encounters with much larger human variants
A similar race is the Poralui, who live in the urban areas of Indadvi and take advantage of existing Wila society. They were historically seen as pests by those of Indadvi, but relations have been improving.