亻
=
丿
+
丨
:
Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.
Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).
呆
=
口
+
木
:
The fool (呆) wants to make fun of Don Quixote (d) in front of the airplane (ai1). To fool him, he set up a Christmas tree (木) to look like a huge animal by putting a mandarin (口) on top which looks like the head of the animal. Don Quixote thinks he met his arch enemy and starts to charge the construction, much to the fool's delight.
堡
=
保
+
土
:
Beelzebub (b) created a new olace for his valuables. Inside of the aorta (ao3) he built a sand castle (堡). In the center of the castle (堡) there is a heap of clay (土) on which a safe (保) is resting.