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).
午
=
𠂉
+
十
:
Willy Walrus (w) is having lunch (午) in the space station's living room (Ø3). He was hiding it in a secret location: With a key (𠂉), he can unlock a chamber hidden in the space station's cross (十).