人去楼空

人 = 丿 + ㇏ : Mnemonic symbol: Neanderthal Man (人). Robinson Crusoe (r-) is looking for snacks in the encampment's kitchen (-en2) when he suddenly spots Neanderthal Man (人). Neanderthal Man offers him a banana (丿), but Robinson Crusoe doesn't trust the present and pokes it with a finger (㇏).

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.

楼 = 娄 + 木 : In the outhouse's kitchen (ou2), Sir Lancelot (l) set up a Christmas tree (木) next to his lunar mansion (娄). Lancelot made himself a Christmas present by adding another floor on top of his lunar mansion. His lunar mansion now is a big, storied building (楼).

楼 = 娄 + 木 : In the outhouse's kitchen (ou2), Sir Lancelot (l) set up a Christmas tree (木) next to his lunar mansion (娄). Lancelot made himself a Christmas present by adding another floor on top of his lunar mansion. His lunar mansion now is a big, storied building (楼).

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.