異口同聲

异 = 巳 + 廾 : Maud Younger sees a wyvern in the space station's bathroom and thinks it's soo strange that there's a wyvern in the space station. But after all, it's just the lab snake which ate a double axe.

異 = 共 + 田 : Maud Younger (y) has been sent off to help the communist (共) tending the field (田) in the space station's bathroom (Ø4). She proves very helpful as her secret strange super power (mnemonic symbol for 異), xray vision, helps her see whether the potatoes are ready or not.

Mnemonic symbol: 口 shall be represented by a mandarin. Karl Marx (k-) is enjoying a mandarin in the outhouse's living room (ou3).

同 = 冂 + 𠮛 : Tommy Turtle (tu) is stapling (冂) a magical scroll (𠮛) to the wall of the engine's kitchen ((e)ng2). On it he wrote that he's looking for two twins (mnemonic symbol for 同).

声 = 士 + 尸 + 丨 : Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.