Sara and Tara picked up everything quickly and strode towards the light beam as soon as possible. They were on an important mission and they wanted to succeed in this mission no matter what.
This was a mission personally given to them by their patriarch and not known even to their clansmen. They can't fail this mission or else their positions in the family would likely deteriorate.
This was why they kept away from their clansmen. Even though they belong to the same family, there would be competition between them which would cause conflicts among them. There would sabotages and backstabbing included among them, making sure that others would succeed. This way they would be in the front seat.