Frozen blushed a deep blue, and nodded. "Very well my dear," he said. He kissed her forehead, gently, "Rest now love."
"I am," he said, looking back at the door where he left Rosy. He sighed gently, deeply wishing he could remain at her side. He knew, however, that this was necessary if they would ever have a life of peace together.
"If all goes well for you, Mr. Heart, you will be with her again soon." Celestia said. Celestia's magic surrounded them, and they teleported. They appeared in the throne room, with a guard standing at attention. "This is Aerik. He will be your personal guard throughout your duration of staying here." Celestia said.
Frozen looked at him and nodded his head gently, "well met," he said in a soft tone. He relaxed slightly, he doubted she would assign him a personal guard if she intended to kill him.
"He will escort you to your room. When you have settled, you are free to move around. Aerik will accompany you at all times. If you disappear from Aerik's sight for any reason otherwise than the restroom, or during sleeping hours, he will alert me immediately, and you will be tracked down." Celestia said sternly.
"As much as I wish I could believe that, you need to prove yourself first." Celestia said. A moment of gentleness crossed her face. "Mr. Heart, if you do prove yourself, you will be free to live your life however you desire. We might even be able to turn you mortal. We just need to prove you are genuine first."
"Sounds simple enough," he said softly, "I do not begrudge you for being cautious, we are dangerous creatures."
"Indeed you are," the princess said, nodding. "Aerik will escort you. Please make yourself at home." The guard bowed to Celestia, and began walking away from the throne room.
Frozen nodded and began to quietly make his way towards the library. He figured he may as well get some reading and studying done since the royal palace was open to him.
"Mr. Heart?" Aerik called, in a low, sinister voice. "Do you wish to see where you will be residing in the duration of your stay?"
"It's this way." he said, turning, and leading them through multiple hallways. He stopped in front of a room, and opened it with a key. His horn glowed, and a duplicate of the key floated over to Frozen.