直言不諱

直 = 十 + 目 + 一 : Mnemonic symbol: someone straight edge. James II of England (zh) decided to go straight edge (直) in the space station's kitchen (Ø2), and he also decided that this means he won't listen to music anymore. The Eye of Providence (目) promptly plays some music on its flute (一) to tease him, whereupon the James II of England defends himself by holding up a cross (十).

言 = 亠 + 二 + 口 : The horizontal lines look like sound waves that emerge from an opening: I'll resemble 言 by a megaphone.

言 = 亠 + 二 + 口 : Maud Younger rushes into anthill and in the kitchen she uses a megaphone to loudly announce that the world revolution will soon start. She also tells the people that she has berets for everyone so that everyone will be able to be in style for the revolution. However she doesn't tell that she prepared the berets in another way: to each beret, she attached a mandarin via two capacitors which forms a formidable antenna, so that after the revolution, she'll be able to transmit her speeches directly to the wearers' brains.

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.

讳 = 讠 + 韦 : For Helga Horse (hu) soft leather gloves (韦) are a big taboo (讳), so she sets up an advertising column (讠) in the Eiffel Tower's bathroom (ei4) with an image of crossed-out leather gloves to tell everyone that they should not talk about it.