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).
屋
=
尸
+
至
:
Willy Walrus lives in the space station, but sometimes he goes out into his small garden shack. Today, something is just wrong, and when he visits the shack's arrival part, he knows why: A ghost has arrived!