锐气

锐 = 兑 + 钅 : Rachel Rhinoceros (ru) works in a cash exchange booth (兑) in the Eiffel Tower's bathroom (ei4). Every day she is very acutely (锐) watching her customers as they count their money, always having an impressive golden harpoon (钅) at her side just to feel safe.

Mnemonic symbol: a balloon. The Queen of Hearts is disappointed by her balloons. She expected them to float upwards, but in the space station's bathroom, They float randomly in all directions.