I don't think there's hate between them, they just have different personalities.
Troian is almost 30 and sasha was 13 when they started filming.
Typically the only times we see Lucy post around on set is when she's filming with Ian.
I mean if you have any pictures with your group of friends that includes one of the most famous girls in the U.
So the way it seems to me is that although they all have great chemistry with each other, lucy hale is just their co-worker they love her but don't spend too much time with her outside of work.
Sasha and Lucy seem to have their own group of friends that they are very close to and they also seem a little more reserved and shy away from the lime light.
The youth recognize this artist as Aria Montgomery a character she played in a television series Pretty Little Liars which aired in 2010 and successful completed 7 years.
I think that when the 5 girls hang out on set, Lucy is usually seen with Sasha more.