孑遗生物

孑 = 了 + 一 : Just inside the elevator's kitchen Joan of Arc hands a prize cup to a very proud mosquito. The mosquito won a flute-playing contest.

遗 = 贵 + 辶 : Sometimes, just inside the space station's entrance (Ø2), Maud Younger (y) woefully thinks of her lost (遗) treasure chest (贵). It was filled to the top with gladiator sandals (辶); but it was too heavy to bring to the space station, so she had to leave it behind.

生 = 牛 + 一 : Mnemonic symbol: a cradle.

Sherlock Holmes (sh) comforts a crying baby bull (牛) in a cradle (生) in front of the engine ((e)ng1) and plays him a tune on a flute (一).

物 = 勿 + 牛 : Willy Walrus (w) wants to become a physicist (物) and does research about dark matter (物) in the space station's bathroom (Ø4). His motivation is to become a super villain and rule the world. Just as he is about to have a breakthrough, a huge black ox (牛) flying with the help of bat wings (勿) hits Willy with an oxerang and takes away the dark matter, saving the world.