The tattoos last from five to 10 days.
"Due to the cooler weather, we are now taking bookings out of a local salon in Springfield, Crazy Beautiful, as we prepare to do special white henna and coloured henna body paint designs for school balls," said Ms Vail.
The four artists - Sonia Mozahid, Nicole Pakau, Sandeep Kaur and Ms Vail's daughter Laleyna - bring together a range of cultures and religions.
"Henna is a trend that is just picking up in New Zealand and we are claiming it in Rotorua," said Ms Vail.
Ms Mozhaid, from Bangladesh, said demand for the group's tattoos was growing.
"We now have to keep going as the market is packing up because our queue is so long. So we have introduced booking."