See a (Money)Penny, Pick it Up, All the Day You'll Have Good Luck
Eve is bad luck for Bond before she becomes good luck, shooting him on the train and almost killing him at the beginning of the movie. But that apparent death is the impetus for Bond's resurrection, so Eve is totally a blessing in disguise.
Being a Bond girl of sorts, Eve doesn't have much of a backstory. We do know that she can pull her own weight. We see her driving through the crowded streets of Istanbul and coolly accompanying Bond to a seedy Macau gambling den. Plus, she's probably better with a rifle than our initial introduction to her would lead us to believe. At least that's what she says:
BOND: Well, you gave it your best shot.
EVE: That was hardly my best shot.
BOND: I'm not sure I could survive your best.
Eve also matches wits with Bond, flirting constantly and perpetuating the will-they-or-won't-they tension Bond and Moneypenny have been known for since the inception of the characters.
But Eve doesn't let Bond know her name until the very end, when she reveals that her last name is Moneypenny. By that point, she has given up fieldwork, feeling she is more suited to assisting Bond in the office instead. What's that about? Is that an accurate assessment of her own skills, or has she taken herself back to the 1960s, to the origin of the Moneypenny character? We'll have to watch Spectre to see if she keeps that promise to stick close to the filing cabinet, or if she'll once again have Bond in her rifle sights.