Loki's adopted daughter

Pet

Strange
"Well that went terribly..." Loki glared at me while we waited in the hall. She was inconsolable so he suggested we give her space. "Once she calms down I'll test her for magical ability, just to confirm" if she's already this powerful she needs to be trained immediately, and I'm not sure if Loki can be trusted to teach her. After a while of silence Loki went to see if Holly had calmed down only to come back out frantic.
"Holly's gone!" I stood up and immediately stumbled as the floor started shaking.
"What was that?" an earthquake wouldn't have been able to shake Stark Tower... Loki turned to the window and my eyes followed. Pillars of colorful light flashed down into the city one after another.
"The bifrost... they're actually attacking..." Loki spoke first.
"The Frost giants?" he nodded and I sighed. "We need to get to the others-" I opened the door to Holly's infirmary room only to find it empty.
"I'm looking for Holly" I grabbed his arm just before he could run off.
"If we get to the Avengers they can help and we'll find her faster" he scowled and pulled his arm away before running down the hall toward the living quarters.

Holly
How'd I get to the park? This doesn't feel like a dream, or an airplane whatever. While it doesn't feel like a dream it doesn't feel real. The park is empty with faint screaming coming from all directions and the ground shook. I wandered around for awhile before I saw someone... someone blue. "Hello? Sir?" I slowly inched closer remembering that painful cold that felt like it pulled me into a sleep I wouldn't wake up from. "Are you okay?" I sped up as I saw purplish red blood coming from his side. He just grunted as I got close enough to see his face. He seemed... familiar. I reached out to try and see his injury. He was weak from blood loss and could hardly struggle as I moved his hand. It looked bad... it was deep like something tried to cut him in half. I thought about it just closing up and a white glowing mist came from my hand. My magic is usually black though? Somewhat distracted by my thoughts I barely noticed the wound healing from my magic.
"Why would you help me?" he questioned looking between is now healed side and me.
"... you're Ymir right?" The one that tried to talk to before that other one showed up.
"Most mortals can't tell us apart" why not? I cocked my head to the side confused but he just let out a slightly strained chuckle. I noticed the screaming stopped and rainbows started showing up in the sky. But the rainbows went straight up? Before I could think about it any further a rainbow picked me and Ymir up. It felt like nothing... like my dreams but just energy with no form. When I regained my senses I was cold.
"What's that?" I opened my eyes to realize I was in Jotunheim surrounded by unhappy frost giants. Ymir gently pushed me to hide behind him, putting himself between me and their glares.
"New pet"