Tanaka's name (田中) translates as "Centre of the Paddy". "田" in particular means "(rice) paddy" in Japanese, but in Chinese, it represents "field" or "cultivated land". I take it by her own description that referring to herself as "Gaia's Counter Force" means that she is the/an embodiment of...
@orangokitty Yes, before the story began, the two female characters had swapped their souls so the protagonist became Raeliana (aka our MC) and the antagonist became Beatrice (because the antagonist didn't want to be a footnote in a novel as she was originally killed by the first fiancé)...