Biogenics, arcanotechnology, and post-genderism in the Cosmic Era
The legacies of a pre-human civilization in the Cosmic Era
Elves are not actually aloof. They are actually extremely family-based and insular, and often intermarry inside their families, making them uncomfortable around those not of their family. Therefore, they shield themselves behind pretended aloofness and coldness until they are comfortable in others' company.