Hamyap is an Unggoy soldier who surived the Human-Covenant war whilst on Balaho. When Cortana activated the Guardians, she eventually reached Balaho.
He wrote that he was very surprised, that after years of having to listen to the Sangheili and having to fear Spartans, Cortana came to Balaho to help them. She brought them food and other resources.
After Cortana did this, he and many other Unggoy on Balaho joined the cause of the Created.