Trisha is the oldest. She is fierce and brave. She is also the most loyal toward Loki.
And she loves Loki. Loki might see all of them as his daughter. But that does not mean all three of them look at him the same
Trisha had always love him. Riana believe Loki notices this. But he had never acknowledged this feeling that Trisha had felt for him
As for Greisha, she was the youngest. Loki when he first brought that child in the house, he doted on her.
At night when he had nothing to do, he would tell her fairytale stories and would conjure magical sight for her to see, so she could laugh.
She likes to snarl at Loki, like a feral kitten when she first came. She was hurt by the world and she was healed by Loki.
The three of them were all abandoned to die and they were all saved by him. It is this bond that binds them together.
And it is this bond that made her to have such conflicting feeling now that she is face to face with him like this.