世界各地

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.

界 = 介 + 田 : Joan of Arc wants to leave this world and sets up a rocket launch field in the elevator's bathroom. The field looks like a normal crop field, except that there's a rocket in the middle and that the Joan of Arc marked the boundary with white and red tape.

各 = 口 + 夂 : Mnemonic symbol: each and every (各) one of us is made of atoms, of which most were created in a star (from lighter atoms). That's why I choose to represent this character by a star. Guy Fawkes (g) is stepping on a mandarin (口) with high heels (夂) in the bathroom of the elevator (e4). As he squeezes, the mandarin suddenly explodes in a rain of stars (各). Each and every (各) one of them is shining brighter than the others.

地 = 也 + 土 : Dorothy Gale (di) hates the cleanliness of the space station, so she used an excavator (也) in the space station's bathroom (Ø4) to dig a pile of dirt (土) out of the ground (地) for a mud bath.