Epic Battle of Mecha and Tentacles in Alien City

From a low angle, looking up through a wash of murky watercolor depicting a sunken alien city, an angelic mecha young woman with flowing cerulean random color long curly hair, her gaze a blend of ancient wisdom and fierce determination, clad in a pink-white mecha kimono suit rendered with soft watercolor blooms, battles a colossal long neck mecha octopus with loose washes of color suggesting explosions and scattering debris as she slices a tentacle with her massive mecha sword.