亘古未有

亘 = 二 + 日 : Mnemonic symbol: in this character the sun goes from horizon to horizon, and thus I choose to represent it by a contrail.

Guy Fawkes wants to find out where contrails really come from, so he follows one until he arrives at the encampment's bathroom. There he finds that the sun was experimenting with a capacitor. She blew the capacitor up accidentally, resulting in lots of smoke, which then formed this contrail.

古 = 十 + 口 : Mnemonic symbol: at least on German maps, this character actually resembles a cloister.

Oh no! Gitta Giraffe (gu) found that the golden cross (十) broke off of the cloister (古) in the space station's living room (Ø3)! She skewers a mandarin (口) on top of the cloister so that she can skewer the broken off cross back on to fix it.

未 = 一 + 木 : Shortly after finishing a new installation in the Eiffel Tower's bathroom, Ai Weiwei is imprisoned by Willy Walrus, because—out of all places—Ai Weiwei put his new installation right into Willy Walrus's toilet. Ai Weiwei's installation is a Christmas tree with a tiny, slightly tilted flute on top. Ai Weiwei would really, really like to correct the tilted flute, but so far, Willy Walrus has not yet let him out.

有 = 𠂇 + 月 : Mnemonic symbol: confetti.

In an act of revolution, with a pair of scissors (𠂇) Maud Younger (y) is cutting a paper moon (月) into tiny pieces in the outhouse's living room (ou3). There is (有) only confetti (有) left over.