The Flames that protect the Armor

It starts with a young Erza and Natsu. Erza cares for Natsu deeply, but she keeps her image as his friend, the image of Fairy tails strongest fairy. She watches Natsu grow, she watches him fall for Lisanna and then she watches him feel the pain of losing Lisanna, she wants to be there for him, but doesn't want to look weak in front of him.