Snail,
The more I think about your story idea -- and the fact that I have been thinking about I take as a good sign that the idea has potential -- ?the more I think you've got a gold nugget of an idea for a comedy. ?
As I see it, the hook of your concept is the situation, the setup, not the character. ?And?I suggest the situation,might benefit from some tweaking.
Have you considered her crash landing in a remote Chinese village? ?The reason I say that is that because of China's draconian one-child policy, only recently relaxed, ?there is a serious shortage of women. ?(An unintended consequence: because Chinese family culture prefers male babies, tens of millions of ?female fetuses have been aborted.) I just heard a story this morning?on the BBC?about a remote ?Chinese village of ?1,600 where there are 116 bachelors with no women around to marry. ? What if she crash-landed into a village like that?
IOW: ?you don' t need to make up a tradition to start your story. ?Just have her rescued by bachelor men of the village (or a group of brothers within such a village) who are so desperate they decide to propose to her as a "package deal", ?a polyandrous marriage with all them. ? They make her an offer she can't refuse: lots of benefits, attention, respect, money, clothes, the guys (or their mothers) doing all the housework, etc.
In fact, she doesn't need to crash land in the village. ?She could wander in as a tourist from another country. ?(A tourist fleeing from the frustration of another failed relationship or marriage because she didn't the attention she expected, the respect she deserved.)
Whatever, the demographic imbalance of too many men, too few women in China (and other countries like India) creates a ripe opportunity for a story. ? It's a script somebody's going to write. ? For a film I want to see. ?I hope it's you.
fwiw