空降兵

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.

降 = 夅 + 阝 : Shortly after Jin Xing descended down from the heavens to visit Joan of Arc in the anglepod's bathroom, the Pope follows and descends from another heaven. He messes up the landing though and lands on Jin Xing, which in turn falls on the Joan of Arc.

兵 = 丘 + 八 : Brunhilde (bi) and the soldier (兵) visit a burial mound (丘) in front of the engine ((e)ng1). It is round like a ball like the deceased inside. To commemorate the round fallen soldier they put down eight-balls (八).