So apparently there is an entire species of supernatural females out there who can use magic to mess with your brain. This is a highly unattractive concept on a number of levels. For one thing, you're quite attached to the concept of free will, particularly when it's your own; for another, the idea of becoming someone else's minion-slash-thrall just doesn't sit right. You've always been one of the top dogs in your social circle, and ever since you harnessed your magical potential, you've been able to exercise a disproportionate level of influence over the adults in your life. You are, if not wholly in control of your own life, then at least well on your way towards achieving it, and the notion of losing your capacity for self-determination is simply offensive. Your inner Ganondorf certainly rebels against the notion - the King of Evil is no woman's besotted bootlicker, not even a goddess's. And that's not even getting into the question of what kinds of disturbing things a succubus could make you do. You've seen how girls treat boys they have authority over, and being a packmule to a demonic Cordelia for the rest of your life does not appeal - though even that's a pleasant dream compared to unsettling visions of bows in your hair, fancy dress parties, and playing house. Forever.
Your skin crawls just thinking about it.
Consequently, as soon as the noise of the crowd has died down, you turn to your trusted fairy companion and ask her to tell you everything she knows about succubi, with an emphasis on defeating their magical mind-games. The ensuing conversation takes up most of the break, and boils down to four points.
Firstly, willpower. The most basic defense against a succubus's varied forms of control - and they have several, ranging from low-level charms to outright thought-crushing domination - is to have a mind strong enough to fight back against the demoness's own. Briar takes the fact that you were still able to think after being exposed to the succubus's allure as a good sign, even if you did physically freeze up until it went away; on the other hand, she points out that it will get harder to resist as you get older. That hardly seems fair, but fortunately, there are several methods at your disposal for shoring up your mental defenses. Meditation will help, as will some other disciplines that Lu-sensei can teach you, and there are a number of spells well within your ability to cast that will further augment your resistance to mind-control. The trick with those, of course, is to be able to get said spells cast before your brain turns to so much mush - which is where protective items come into play.
The second point is physical contact, and specifically, avoiding it. As dangerous as they are at a distance, succubi become even moreso up close. There are several different population groups - which are sometimes referred to as "tribes" - and most of them have access to some sort of contact poison, tail stinger, or touch-based mystical power, all of which are designed to attack the victim's will and make them more susceptible to control. Quite aside from that, most succubi are at least as strong as a human woman of similar size, with certain tribes and rare individuals going well into the "superhuman" category, and they usually have functional and very well-manicured claws. There is also the risk of "combat shapeshifters," who have worked out how to use their racial talent for changing form to create a variety of weapons for close combat. Spiked and/or razor-edged tentacles are apparently a popular choice. As it stands, Briar figures your existing physical and magical training are decent for keeping a typical succubus at a distance, although some weapon training might be in order.
The third point is magic. Quite aside from their natural powers, succubi are noted to possess a racial aptitude for certain types of magic. It's quite common for the sorcerously-inclined among their kind to study enchantment magic, to enhance their inherent talents of mind-control, and illusion is another favored field, adding new layers of deception to the mind games succubi like to play with their enemies. Summoning is a bit less common, but an excellent fit for a succubus's existing mental powers and typical reluctance to enter physical combat. Fortunately for you, most succubi who take up magic do not advance terribly far with it, lacking the intellectual fascination or desire for raw power that drive most high-level practitioners; instead, they tend to favor simple spells that yield quick results for common problems. Briar figures that your abilities fall short of a typical succubus-sorceress's skill in her favored fields, but the fairy is also quite certain that you have more numerous and varied surprises up your sleeve than most such individuals.
The final point is pure charisma. Even with all of her supernatural advantages countered, a typical succubus remains an intelligent, observant, and confident female, highly experienced at manipulating social trends and individuals to her own advantage. It's not unheard of for a succubus who's been chained to the point of immobility and had her powers sealed to eventually talk one of her captors into letting her go free, and what they can achieve when dealing with a non-hostile audience - let alone a trusting one - is even more impressive. Or frightening, depending on which side you are. The best way to deal with that is to keep on doing what you've been doing on the social side of things - keep building up your interpersonal skills, figure out girls as best you can, then apply the lessons in force should a succubus ever turn her eye towards you.
Altria and Cordelia listen to Briar with a certain sense of feminine smugness, at least until the fairy mentions that while succubi have a natural talent for coercing males, their powers are by no means limited to affecting just one gender.
"After all," Briar says, "as much fun as messing with boys can be, sometimes a girl just needs a circle of other girls to be her minions, y'know?"
The British blonde and California brunette don't smirk quite as much after that, and pay rather closer attention to what Briar is saying.
At length, the semi-finals begin.