Taiga may seem to have a few screws loose, but she's actually far more willing to defend one of her students than to fight for herself, thus making it easier to take her when she's alone. It's also tricky to befriend her, thus making the easiest way to capture her is to treat her to some drinks and tie her up while she's a bit tipsy. Even though it's an under-handed trick, it's far better than the alternative. Taiga will either be feisty or start crying. Either way, use enough rope to keep her very secure and use a tie that exposes her legs by hiking her long skirt. Like a tiger, her weak spots are her ears, so use any kind of gag that doesn't block access to them- but also be sure to gag her in a way that keeps her from biting. Tread cautiously and she won't attempt revenge.