(Reasoning for being able to get past it is more time to prepare against it, a barrier of high heat can be overcome by even higher focused frost, and determination. Had no clue about the area or gaurds stationed but I'm guessing it would be lightly guarded if anything since the outpost has just arisen. Feel free to discuss this post with me.)

Aeis looked at her confused as she suddenly left. He stood up somewhat angry at her.
"Those two simple questions that I practically answered when we first met is all she wanted? That's all!? ..."
He put a hand over his face to calm himself, closing his eyes temporarily. His breathing soon relaxed and he looked toward the way out with distaste.
"Well since she seems to have lost all interest I guess I should escape. Considering her resolve before I'm guessing there's a trap of sorts..."
Aeis looked to the damp corner and motioning to it with a finger, the moisture collected and made a small sphere of ice the formed in the palm of his hand. Tosing it up he guaged its weight, then threw it into the fang like doors. The sphere of ice shattered and turned to steam as the barrier showed.
"Like I thought... heh."
He took a breath and waited a minute for Ophelia to get farther away. Then he fully unleashed his aura, the small dungeon cell chilling over with dry bone chilling air. He held his hand out that was now glowing too much to even see his skin. He slowly walked toward the barrier, his chilling hand getting closer and closer to the bars. For a moment the barrier and his aura clashed, adding resistance to his movement. He winced and finally grabbed hold of the bars, making a shallow cut on his hand as he kept his aura sustained to hold off the heat. The bars began to freeze over from his touch becoming more and more brittle. When it was frozen enough he let go and with a swift following motion kicked hard as he could at the bars. An echoing crack sounded as he bounced off. He quickly caught his balance and briefly fully enveloped himself in his aura as he ran forward and put his weight into a jump kick. The bars broke as he passed through, his aura staving off the barrier. He roughly landed in a crouched position and then stood, looking behind him at his handiwork, a thawing broken entrance and a frosted-over cell. He thought to himself as he walked on, his aura grew to its brightest as he got out of range of the barrer.
'What to do about Isha... No blame should go to her of me escaping, and it's not as if I have a safe place planned for her... I guess its best I leave her here for now. I should focus on escaping for now.'
He stalked through the dungeon sneaking up and unfataly freezing any he met from behind as he saught a way out, most falling to the ground with a cold shoulder. He was seeking stairs as most dungeons were built below ground, seeing as this one belonged to hell, where better to imprison an angel but below the surface, furthest away from the grace of heaven. He soon was seeing the light of the searing sun, a warming light he would stave off this time.