故去

故 = 古 + 攵 : Mnemonic symbol: This character only appears in 做, so we don't need a strong mnemonic symbol. We should be able to refer to 故 when we think of 故事 or 故意. Because it fits nicely to its components, I'll think of it as in the meaning of 故墓, an old grave.

故 = 古 + 攵 : There is an ancient cloister in the space station's bathroom, and Gitta Giraffe once heard a story from her fellow astronauts that there's an old tomb inside with lots of treasure. One day she can't hold herself back anymore and deliberately breaks the cloister open using a sledgehammer.

去 = 厶 + 土 : Mnemonic symbol: The "nose" part (厶) can be seen as an arm, which goes through "earth" (土), and this reminds me of some protesters who lock themselves (or their arms, to be specific) to concrete barrels. Cupids dirt capsule could also be a concrete barrel. So in other characters, I'm going to represent 去 by a concrete barrel.

Cupid (qu) is trying to send himself to earth. In the bathroom of the space station (Ø4), he has prepared a capsule made of dirt (土). He's wearing his lucky fake nose (厶) when entering the capsule.