i take the view that calli's actress and kiara's actress are friends, and play characters that are in love. one is professional, the other is gay. no problems. i'm not invested or interested in the relationship thing, anyway.
if the actresses didn't like each other then obviously things wouldn't have been done like this. i don't actually know how the characters are created but i'm assuming that the people who are going to play them are consulted so that they get something that they can naturally and spontaneously portray. there is likely tests and back and forth until everyone involved is satisfied.