Her name is Cornelia Hale. as the Guardian of Earth, she can control plants and their growth and structure and manipulate the earth and all related materials such as paper, wood, silt, minerals, crystal, gems, sand, mud, some foods like sugar and wheat, silicon, molten rock, etc. At first she thought her powers are lame only consisting on making plants grow to giant sizes and altering their shape but she discovers her powers were much more learning to create earthquakes, levitate and throw rock and stone, create trenches, and cause avalanches and mudslides. In the animated series, Cornelia happens to the Guardian whose power happens to dwarf the others but ironically, her powers are useless when she is not near the ground or there are no plants to control.