Well, as an overview, a few things have to be understood.
Neeley (until last year) was the only effectively active All-Girls dorm at Student Bonfire... and their crew only pulled 15-20 or less on average and MAYBE 30-40 at best. While Moses, Walton, Crocker, and (for basically all practical purposes) the Corp are All-Male crews and literally pull (I'd day) 60-70% of ALL Student Bonfire members. In the middle you have Hart and Schumacher (to a certain extent) which are co-ed and have male and female leaders, but are a drop in the bucket in comparison. The only fair representations of large female participation are OC and FHK.
I know very little about OC (but I do know that they DID have a female Yellow (Disney) in '05 so they potentially might be the least biased, so should I say the closest yet to achieving the upperleadership role) so I can't really speak for them. I myself though cut under FHK, and very much believe in the structure they use for their size and relative gender proportions, so much so I modeled Lechner for next year after them.
I feel as though it is the responsibility of the individual dorm to promote their own male and female sophomore leaders (chairs, chiefs, and yellows) and should be purely based on their freshman performance. This is something I feel IS actually being done appropriately inside existing co-ed dorms. This is in itself a leadership promotion.
I believe what you are inquiring about (reds or browns, because greens are female dominated already), is an issue we have yet to tackle. I feel like any female worthy of the position should be in the running. In my very little experience, no female sophomore leader I have seen has excelled enough to deem a red or brown. But let's be quite honest here, the odds are stacked severely against them. Here's a few of the issues they will face and skills they must have.
1. When it happens, they will be the first, a pioneer into a whole new realm of Bonfire that quite directly effects all the members of the organization. The magnifying glass will be on them constantly. Any and all people with even the slightest inferiority complex or cauvenistic attitude will be at a hairpin trigger and she will have to be able to deal with the constant abuse.
2. She will have to overcome the overwhelming shadow cast be larger dorms and their crew chiefs. Straight up fact: Most reds and browns have come from all-male dorms, because let's face it... Crocker as a dorm for example is impressive. They pull A LOT of folks and because of that their leaders have to be and tend to be of a higher caliber simply to keep everything organized. I can say that I honestly would depend on and feel safest with the Crocker chiefs leading my crew in my absence, and this sentiment comes directly from their reputation and the skill I have seen them showcase. At the end of the day, whoever gets the most attention or has the best reputation usually gets the pass down.
3. Because of #2, the first female will HAVE TO be an overachiever. To overcome any stereotype, you simply have to be nearly flawless. As a sophomore leader, she will have to ask questions before situations arise, give informed opinions when asked, accept opinions contrary to her own from higher leadership and try to make them work regardless, work tirelessly and efficiently (and ask and expect the same from her crew), and constantly ask for work from the Reds and Browns after completely her tasks perfectly. Really chomp at the bit, but not overaggressive or annoying.
4. She has to have a strong, bad ass swing, a loud voice, take no **** from anyone below, give no lip to anyone above, be precise, calculated and composed, be exact and honest, be wise but know when to listen, be strong and brave, and be understanding. She will have to be what is asked of every red pot, to be the symbol of what Bonfire is and stands for, and never relent from this cause.
Can I say all the Reds and Browns live up to this, no, but it is what is expected of them and if a woman came along with these skills there is no stopping her, and I honestly believe that.
Such an accomplishment is a lot to ask and is completely unfair, but these guidelines would make any candidate, male or female, a prime choice for a Red or Brown, it is living up to them.