You manage to fly home, leaving out the back and taking a roundabout route while guardsmen distracted the crowd by parading out the imprisoned cultists. You get Aleena to the infirmary where they examine her and put her to bed.
Meanwhile, your researchers have been analyzing the sample of the glittery dust found at the carriage that the evil fey used on Aleena. It is a combination of faerie dust and some sort of natural venom with narcotic and hallucinogenic properties. The dust itself is a magical catalyst, especially for mind-effecting and enchantment magics, and can also be used to enhance chemical compounds and bind magic to mundane items. Faerie dust is usually secreted naturally by fey, and its possible that this particular fey produces the dust and the venom together as a compound. Strong enchantment magic, as well as a lot of chaos and some evil, is detected on the substance, indicating that a spell of some sort was likely bound to the poison with the dust. Unseelie magics are greatly weakened by the dawn, just as Seelie magics are weakened by the sunset, so it is possible that the magic will fade in the morning and the venom will then start to wear off.