Nikki Angell is a nightclub owner and singer.
She is not officially an operative for anyone but she once was and now when trouble walks through her doors into her place of business, the apparently quite popular nightclub in Paris known as Chez Nikki, she does not hesitate to get involved. This club of hers must be an interesting place to visit because it seems to be filled with Angell devotees, as one reviewer at the time put it: international thugs and thugees hover about her like moths around a candle, and eventually get their little wings singed".
Angell has quite a history in the trouble field, from what we are told [and while we are not told much, exactly, it does apparently speak volumes]. The activities take place in the early days of the 1950s and memories of the hardships and dangers faced by the former members of the Underground, of which Angell was a starring player, remain vivid. Angell is in her early 30s when we meet her which makes her in the early 20s when the War started and she began her dangerous clandestine activities.
She is interesting in that she is very well known due to her place of entertainment and her skills as a sultry singer of love songs at that establishment - and at the same time she is a woman of mystery because most of what she did during the War with in the Resistance is unspoken. A knowing look and perhaps a wry, sad smile at a comment said a lot without saying anything. She has made Paris, France her home now but her accent tags her as Eastern European. [Note: while the actress was born and raised in Hungary and her accent was definitely Hungarian, the character of Nikki was apparently not pinned down.]
When she is not running the nightclub or, as one reviewer put it, offering it "as a place of refuge [for] those who have run out of hope", she likes to spend time with a handsome American foreign correspondent (name unknown). Considering how beautiful Angell is and how seductive her nature and her experiences make her, throwing in the seductive voice when she sings or whispers in one's ear, it is no wonder that newsman, and lots of other men, keep coming back to Chez Nikki.