Is the use of 'Wingman' limited to only a man?

Question

I'm looking for a word to describe a girl which helps another girl hook up with a guy while occupying the not-so-good-looking-one, just exactly what a wingman does! So can that girl be called a wingman or is there another term for her?

According to Wikipedia
Wingman is a role that a person may take when a friend needs support with approaching potential partners. A wingman is someone who is on the "inside" and is used to help someone with intimate relationships. In general, one person's wingman will help him or her avoid attention from undesirable prospective partners or attract desirable ones, or both.

According to Urban dictionary

A Wingman is a guy you bring along with you on singles outings (like to bars) that helps you out with the women.

POST ANSWERS EDIT: I've highlighted a context in the definition which, I guess, does imply that wingman can be a girl helping another girl. But as @Josh suggested that wingman is implied for a man and also I can't find any references for a girl as a wingman.
wingwoman is indeed used for a woman(as @Josh posted) but a wingwoman is usually escorting a man trying to hook him up with a girl.
UD(4th sense defines 'wingwoman' as-

'Unlike a Wing Man, this is not the girl who occupies the hot guy's ugly friend,'

...and I'm looking for a word to describe that girl which helps another girl hook up with a guy while doing all that a wingman actively does.
I said 'actively' because UD( 6th sense)also defines it -

The wing women are frequently spotted around the queen bee, the girls that comparatively make the head woman look better than she actually does.

So I'd like to know a word(noun) for that girl acting like a wingman. Also if she can be just called a 'wingman'(acc. to the highlighted part).
I don't know how else to clarify it furthermore but I'd appreciate any help:)

Answer 1

There's several pages on Google dedicated to wing girl, Urban Dictionary provides two definitions, dated 2005 and 2008 respectively

1. The attractive hot girl who will go out with a good guy friend when he needs to look good at a party or other social event. Not an escort, but a friend.

guy friend:Yo, will you be my wing girl for homeboy's birthday party? girl friend: Sure, as long as you pay for dinner.

and

2. Similar to the word wing man, but is a girl. A wing girl is a girl who helps out a guy/girl friend to meet other people of the opposite sex, someone who proves as an ice breaker. By no means like an escort service.

I'd have never had Kim as my girlfriend without my wing girl, Jen.

Answer 2

In lay Magistrates' Courts in England, the members of the bench normally appear as a threesome. The one presiding sits in the centre, and is known as Chairman (Mr or Madame Chairman), the ones on either side are called "wingers".

I see nothing wrong with calling the people you describe as wingers.