The caption quoted in this thread is a little confusing. I'd assume that the seven people named in it are the seven people who aren't in a bear costume, but I looked for the two who don't have names that are traditionally masculine in English. If these search results aren't misleading, these two are male too. I also checked against a small number of other team pictures online.
So my guess now is that these uncostumed people are the six students on the team with someone like a staff member assigned to hold the sign (see post #28), and the team coach named in the caption is not in this picture.
I can imagine a different uniform color and style for girls, though such a practice may be condemned as SEXIST and NON-INCLUSIVE (of those competitors who identify as "genderless," a member of some fifth gender, or as a complex mix of genders that shifts according to the weather and the phases of the moon).
Huh???
All you had to do is read the second paragraph in the article:
The six U.S. team members also took home five gold medals and one silver medal
Funny how that works out isn't it?