故家子弟

故 = 古 + 攵 : Mnemonic symbol: This character only appears in 做, so we don't need a strong mnemonic symbol. We should be able to refer to 故 when we think of 故事 or 故意. Because it fits nicely to its components, I'll think of it as in the meaning of 故墓, an old grave.

故 = 古 + 攵 : There is an ancient cloister in the space station's bathroom, and Gitta Giraffe once heard a story from her fellow astronauts that there's an old tomb inside with lots of treasure. One day she can't hold herself back anymore and deliberately breaks the cloister open using a sledgehammer.

家 = 宀 + 豕 : Mnemonic symbol: a framed "home sweet home" picture.

The swine (豕) graduated and wearing a graduation cap (宀), it came home to the ashram. In front of it (a1), Joan of Arc (ji) welcomes the swine and hugs it. To welcome her dear swine, she put a gigantic home sweet home (家) picture in front of the ashram.

子 = 了 + 一 : Zorro wants to eat an egg in the space station, and he already put it in a prize cup, as he has no egg cup. He also lacks a spoon, so he uses a big flute to crush the egg open.

弟 = 丷 + 弓 + 丨 + 丿 : Mnemonic symbol: Jesse James, the younger one of the James brothers (弟).

A mean crocodile (丷) harasses Dorothy Gale (di) in the space station's bathroom (Ø4), but Jesse James (弟) is there to stop him. With a composite bow (弓), he shoots a banana (丿) as a warning shot; as the banana doesn't stop the crocodile, Jesse shoots a dinosaur bone (丨) right into the crocodile's crotch.