xx Daisy isn't from this season, she's from the finale, before the time jump but after she's decided to leave SHIELD & etc. I can barely remember my own name atm but we can probably assume she remembers Breck people. She'll know Damon from Breck even if he doesn't remember Breck. And idek wtf else.
xx Sara is new to me but I really enjoy her. Lot.
xx Sharon will be friendly with all the people. She also has Breck history so will be familiar with Damon and Adrian and etc.