KanjiJLPT N1
Empress

empress, queen, after, behind, back, later

Mnemonic

From the edge of a cliff, one figure stands in silhouette. She opens her mouth and her voice booms across the kingdom — every soul kneels. She is the empress, and her word is absolute law.
Additional thoughts
Picture the kanji structure: the cliff canopy on top, then the horizontal 'one' stroke, with the mouth at the bottom — like a regal woman standing on a cliff, her single voice (mouth) commanding all below.
Quick recall
On a cliff, one voice from a mouth commands an empire — the empress speaks.

Details

The keyword for 后 is empress. This kanji refers to the wife of an emperor, denoting the highest-ranking woman in an imperial court. In ancient China and Japan, the empress held a position of great political and ceremonial significance, often wielding considerable influence behind the throne. The character carries connotations of supreme female authority and royal dignity.
On'yomi
こう、ご
Kun'yomi
きさき