I'm going to try my hand at a different attempt at introducing these two.

Think of this as version 2

…

This was all Michael's fault. Well, Michael and Lucifer's if you took in the fact that if it hadn't been for his rebellion, Gabriel wouldn't have run away. Yes. This was both their fault. And Dad's fault because if he had kept a better eye on Michael and Lucifer he wouldn't be in this mess. Stupid absent father. Stupid brothers. Stupid Michael. Stupid Lucifer. And stupid Raphael for not stopping them.

He turned his attention to the sleeping girl. She lay on her stomach, hugging her pillow close while murmuring in her sleep. His charge. Michael had given him a human charge hoping that this could teach his brother some responsibility. And it would have worked, on any other angel that is. Gabriel had spent far too much time in the human world to see them as the bumbling apes they used to be. They had a lot of redeeming qualities. So no. Gabriel did not necessarily hate humans.

He hated being tethered to one like a rowdy pup on a leash where if his charge were in trouble he'd have to come running to the rescue else be on the receiving end of Michael's wrath. This was actually a pretty tame punishment considering Michael had killed for less, and Gabriel chalked it up to being the adorable baby brother.

This charge. A teenager who Gabriel doubted was even of legal age, and Michael wanted Gabriel to be her guardian angel. Bah. The last time Gabriel had extended interaction with someone, Daniel was still in a lion's den.

Michael was going to pay for this.

He heard movement and turned his attention back to the now awake girl. Guadalupe if he remembered correctly. One of the names of the virgin Mary.

Guadalupe stared at him with wide eyes, scared of the fact that a strange man was in her room, Gabriel realized. Of course. He should have shown up as a woman. It would have put her more at ease. He cursed his choice in vessel before raising his hands in a peaceful manner in an attempt to calm down his charge.

"I'm not going to hurt you," he said.

Her eyes flickered to the lamp and back at him before subtly inching closer to it, while keeping her eyes on Gabriel.

The archangel racked his brains. How did he keep Mary from stabbing him with that dagger? Oh right. The whole "Do not be afraid" shebang. How to change that so this girl would not damage that very nice lamp.

"Do not be afraid," he continued, "For I am the archangel Gabriel and I-"

He ducked to avoid the lamp that had been flung in his direction. Guadalupe was now reaching for a book, and if he wasn't mistaken, her parents were running towards them. Wonderful. The door flew open and Gabriel took his chance, disappearing in a flutter of wings, much to Guadalupe's shock.

Her parents weren't all too happy that she killed the lamp, but believed that it was just a very bad nightmare. Gabriel silently mourned the lamp. When the parents returned to bed, Gabriel appeared again in Guadalupe's room, and knelt by the broken shards of lamp and fixed it. His charge stared at him in complete shock.

"B-but...that...h-how...What the hell?" the girl managed to say.

"Told you," Gabriel said, "I'm Gabriel."

"The archangel?" she asked.

"Yup."

"What's an archangel doing in my room?" she asked.

"Michael's being a dick," Gabriel explained, "So you're stuck with me until he says otherwise."

If anything this made her more confused, and Gabriel sighed.

"I'm your new Guardian angel, sweetheart," Gabriel explained.