千虑一失

千 = 丿 + 十 : Mnemonic symbol: a 1 kg weight.

The Queen of Hearts (qi) dropped a kilogram (千) on her banana (丿) in front of the anthill (an1), and now she uses a cross (十) to try and revive it.

虑 = 虍 + 心 : As Loki (lü) is a hypochondriac (虑) he always filters (滤) bottled water (氵) multiple time in the space station's bathroom (Ø4) before he drinks it.

Maud Younger (y) forgot her keys to the space station (Ø1), all she brought outside was her flute (一). She has no choice but to crash the door with the giant flute.

失 = 𠂉 + 大 : Sherlock (sh) locked himself out of the space station (Ø1)! He lost (失) his key (𠂉)! After he was floating in front of the space station for an eternity, a robot (大) came by with a lost+found box (失) which contained his lost key.