Possession~
"I don't want him or anyone else touching you that way."
"Arthur, he is my childhood friend, nothing more." Luna said and shook her head at his jealousy. Arthur's eyes darkened further at her words, his possessive instincts flaring again. He leaned closer to her, his dominant nature coming to the fore.
"That doesn't matter," he said, his voice a low growl. "I don't care if he is your childhood friend or not. I don't want him touching you. You are mine, and mine alone."