不辭勞苦

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

辞 = 舌 + 辛 : The King of Chu (c) is offered some kimchi (辛) just inside the space station's entrance (Ø2), but after having tasted it with his tongue (舌) he politely refuses (辞).

劳 = 艹 + 冖 + 力 : Mnemonic symbol: a very hardworking laborer from the 劳动人民.

A laborer worked very hard to outfit the aorta's kitchen with artificial lawn and an electrically movable sunshade made from a cooking top. As he finishes he is overjoyed to play with the sunshade, having it move up and down, to and fro in crazy ways. As Lancelot enters, Lancelot pushes the off button and gives the laborer an upset look, asking without using words what nonsense he's doing.

苦 = 艹 + 古 : Karl Koala decided to repent for his sins and retreated into a cloister inside the space station. There he leads a very simple life full of hardship, e.g. he gave up on eucalyptus and just eats very bitter artificial lawn.