Syrena kept her eyes on the Jotun while she watches him touch the vines. She had to admit that the prince fascinated her somehow. Not to say that she was touched by his innocence, but it was his bravery and benevolence. Like as if she was falling in love. But she knew better since Loki was in love with Eric and not her. Remarkably, she didn't feel any jealousy to that. As a creature of nature and of the forest, it was her duty to keep him happy. Same for the rest of her kin. 

Loki saved them once, by Ravenna. Since the forest had turned dark, the mermaids became vicious and bloodthirsty, feasting and drowning visitors instead of praising them. Syrena was sure that she was forced to do the same since the dying magic of the forest drained the gentle goodness in them, becoming deadly predators. But it wasn't long before the forest got its power back. They were whole and living again. 

Syrena watched Loki touch the vines before she noticed him look back at her with a smile. She just realized that his emerald eyes were looking into her hazel-green ones. Suddenly, she made a smile before she giggled and swam behind a blue vine tree, hiding playfully. She made a giggle again. "Catch me", she chided in a sing-song tone with another giggle.