>>92848
There are three ways that I am aware of:
1. Get into her circle/group and have an "in" to woo her and have your way with them, this might need months of preparation, depends on your skills and alibis (this is why there's a few male chuubas and simps who get too comfortable/confident and end up getting cancelled)
2. Manage to groom them for months previous to the con, and have the con as an excuse to bang them as
>>92790 mentioned. This requires you to be their personal oiler/paypig.
3. Somehow, manage to flirt with them at the con when they're incognito and bang them at a party off-con if you're good enough to pick up girls like that. If the con has an adult section or booths with dares and other group activities and you're not autistic/introverted, that is a great place to do so, as long as you can read their cues.
But I'll be honest,
>>65587 is the most likely outcome 99% of the time. Remember they're also looking to get something out of this and if you're not providing it, or the illusion of it, you'll end up empty handed/blueballed. Have fun and don't get cancelled!