What hominid lived 5.2-5.8 million years ago?

No hominids had evolved 5.2 million years ago. The first known hominid was H. habilis, and they existed about 3 million years ago.

Our ancestors that were alive between 5.2 and 5.8 million years ago were the Ardipethicus genus, which lived in the rainforest, walked bipedally, and had an opposable big toe.