Amazing Agent Luna (3 vol in 1) By Nunzio Defilippis

Her name is Luna, and she's the perfect secret agent. Grown in a lab from the finest genetic material, she has been trained since her birth fifteen years ago to be the U.S. government's ultimate espionage weapon. But now, she is given an assignment that will test her abilities to the max--high school!
Her mission: to pose as a high school student at Nobel High and uncover a sinister plot engineered by her arch nemesis, Count Von Brucken. But the one thing she has not been trained to handle her own feelings. Especially when she starts making friends, rivals, and crushing big time on bad boy Jonah, son of the evil Von Brucken himself!