Complex sentence: Her surname, "Shiranui" (a Japanese optical phenomenon similar to will-o'-the-wisp) refers to her pyrokinetic abilities; she can create and control fire, although she is not immune to her own flames.
Split into simpler sentences: Her surname, "Shiranui" is the name of a Japanese optical phenomenon similar to will-o'-the-wisp which refers to the character's pyrokinetic abilities. She can create and control fire but she is not immune to her own flames.