A clue-


Whenever Arianwyn feels alone or seems a bit depressed, Sophia comes near her and confort her sister the best she can, hugging, caressing and saying sweet things to her. It's as if she can't stand to see Arianwyn being alone nor sad.

She follows her sister almost everywhere, and even sleeps in the same bed than her, to make sure that even at night time, she's feeling okay.

All that attention might show somewhat smothering, but Sophia wraps it into such nice intentions and delicate manners that Arianwyn can't say it bothers her.