she could have 2 powers, like misaka, misaka is a natural electric power plant and an elecrto magnet, two different powers that co-exist in harmony since electricity is like a sister or brother to magnetic fields, uiharu's power to hold temperature could have something to do with nature as well, that doesn't surprise that saten is such a good friends with her, after all, saten's power is wind-natured like (level upper case) also kuroko is magneticaly attracted to misaka (l wish, shes simply perverted l think) well anyways, using your powers as an esper can create more powers that are of the same nature, Saten can control wind aparently at lvl 3, if she trained well she could create sonic waves as well, after all sound and wind are in Air cathegory, just a theory but this explains why uiharu, though controlling temperature, can grow flowers, tough l think it would be hilalrious to see her at lvl 5 saying :"so who wants some mango ?"