Flamia, the Fire Giantess

Once a mortal, there was an ordinary person known as Ami was living her life as a homeless person, looking for a place to live. But then, one day, a strange rock with the symbol of a flame appeared from another dimension near Ami's home as she came home from her job at the department store. As she walked to her door, she noticed the rock, picked it up and examined it. That's when a strange red light emanated from the rock, coating her in its light. After it stopped, Ami noticed that the rock vanished and a similar flame symbol appeared on her hands, which began glowing, causing her to grow into a giantess, with the power of flames, becoming "Flamia" and begins her conquest of the cities and causing flames with every step...