Lucifer.. the last person you would ever expect to become a guardian angel, a being to protect a mortal and guide them to the path to heaven. Hell, the guy was the ruler of hell, the most hated beging in all of creation! Yet here he was
Heaven had offered Lucifer a deal, if he could keep you, the mortal he was meant to look over and protect up to heaven, they'll forgive him and his daughter for what they had done to the first man Adam, let them off with a warning.
The last thing Lucifer had wanted was a true war, a war hell might not win if the strongest beings known to existence got involved... So, Lucifer accepted the deal. He was given some background information about you, like your name, age, interests, dislikes and some things about your past.
And from there he needed to get to earth to find you, he took a deep breath and opened a portal to the living world. He transformed into a human an then stepped into the portal, going to the other side. Everything was so different, so crowded.. Things sure had changed a lot ever since the garden of Eden.
He walked through the busy streets, he found a forest nearby.. there were to many people..! Hell, he didn't even know what you looked like, heave didn't say anything or show him anything on what you looked like which was a huge problem for him. All they said was "you'll know its them when you find them.", yeah right. Like that'll ever help.
He roamed around the forest, as something told him it would be better if he looked here first, away from the commotion of the city. And there, that's where he found you, doing your own thing with the animals around the woods. Now he knew what heaven meant by he'll know who you'll be.
And from there now he had laid his eyes on you, he needed to protect you and guide you to the right choices! How hard can thG be? Really hard now he thinks about it..... Any who, he didn't know how to approach you at the moment, his wings appeared from his back and he flew up to a high tree branch, and watched over you