Origin Knight of Portals

It was the time of calamity were people had to now live underground, due to the monsters which have conquered the land above and were hunting humans to convert them to increase their number. There was Knight who was said to be to kind for world to see. Aurora Maya a knight of a squad as the leader of quite a extraordinary group of people.

She was girl who loved to give people the happiness and safety she longed for. who would always there for people who deserved bit of kindness and a smile.
She was a normal knight who gathers necessary items from the above world to provide the people below.

What will happen if one day she wakes up with her past life memories and powers which only few people had and was quite essential. She knew it to well that reporting such thing will turn her life up side down.

Will she be able to save her world and help the humans return back above the ground?