殚精竭虑

精 = 米 + 青 : Joan of Arc scoops a bit of water from the fountain of youth in front of the engine and pours it into a bowl of rice. The water refines the rice into rice wine, and as Joan of Arc drinks it, she finds her spirit renewed.

竭 = 曷 + 立 : Joan of Arc (ji) is taking part in a game show in the elevator's kitchen (e2). The top prize, a very beautiful vase (立), is standing right next to her. She is just about to spin the quiz wheel (曷) for the last time, but unfortunately she already exhausted (竭) all of her jokers.

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.