The Harsenes (origin of the word is unknown) have been engineered to be extremely intelligent and need less sleep than normal, having a great stamina to pursue their scientific curiosity. Culturally they tend to value knowledge and science and tend to be obsessed with finding the cause of the Catastrophe. Due to their intense focus on the Catastrophe, they get on well with the Colonists.
Harsenes are very intelligent. They have somewhat better than average stamina, but are not very strong.