介殼

介 = 人 + 丿 + 丨 : Mnemonic symbol: 介 looks like a rocket 🚀. Neanderthal Man (人) and Joan of Arc (ji) are preparing a rocket (介) for its start. Between (介) the layers of the outer shell (介) they are stuffing bananas (丿) and dinosaur bones (丨).

壳 = 冗 + 士 : The Queen of Hearts (qi) is dating the bachelor (士) in the aorta's bathroom (ao4). The bachelor tries to impress the Queen of Hearts and inhaled a lot of helium (冗), but instead of sounding funny he is just squealing so much that the Queen of Hearts hides under her carapace (壳).