Maybe because of the guilt Justin had for Anna, he tried his best to make it up to her by caring for her like a brother and a friend though he is her uncle by blood.
Samuel was a mildly indifferent person compared to the other two but he cared for Anna in his own way.
From the starting itself they were like tom and jerry always having some petty fights but that was also refreshing for Anna as it reminded her of her and Aiden's close friend Drake.
So, although they have not known each other for long, Hannah, her boyfriend Samuel and their 'friend' Justin became Anna's new friends.
Well, a new family to be accurate. Without them, Anna would have surely gone into depression for how much she missed Aiden.
They are her saviors. Especially Hannah.
Meanwhile, their friendship was well from the Xander family thanks to Samuel and Justin who constantly made sure not to leave any clues of their real background.
