于 = 亅 + 二 : Mnemonic symbol: prepositions (in, at, on, to, ...) are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.

Yu the Great (于) was assigned to repair the electronics of the space station's kitchen (Ø2), but instead he was snacking honey from a honey jar (于). Unfortunately his capacitor (二) got stuck in the honey and now he has to use a crowbar (亅) to lever it out.

你 = 亻 + 尔 : Nefertiti and Rosa Luxemburg are sending you a peace dove inside the space station.

们 = 亻 + 门 : Rosa Luxemburg and Mahatma Gandhi are fighting on top of the Erechtheion. Rosa thinks it will be an easy win, but she didn't see the trap door in the floor yet.

这 = 文 + 辶 : James II of England (zh) is carrying a heavy book (文) in the elevator's bathroom (e4). This (这) book is so heavy that his gladiator sandals (辶) are sinking deep into the sand.

花 = 艹 + 化 : Helga Horse found an interesting way of converting artificial lawn into a flower with the help of a transformer. In front of the ashram, she feeds the artificial lawn to the input of the transformer, and watches a flower grow at the output.

花 = 艹 + 化 : Helga Horse found an interesting way of converting artificial lawn into a flower with the help of a transformer. In front of the ashram, she feeds the artificial lawn to the input of the transformer, and watches a flower grow at the output.

花 = 艹 + 化 : Helga Horse found an interesting way of converting artificial lawn into a flower with the help of a transformer. In front of the ashram, she feeds the artificial lawn to the input of the transformer, and watches a flower grow at the output.

花 = 艹 + 化 : Helga Horse found an interesting way of converting artificial lawn into a flower with the help of a transformer. In front of the ashram, she feeds the artificial lawn to the input of the transformer, and watches a flower grow at the output.

果 = 木 + 田 : Gitta Giraffe (gu) is not feeling well inside observatory (o3) and decides to eat healthy. To plant a field (田), she first distributes Christmas trees (木) as manure, then puts a field on it and finally plants grapevines. Soon she will be eating grapes (果) and feel better.

山 = 丨 + 凵 : Mnemonic symbol: 山 looks like the tip of a fork. Sherlock Holmes (sh) is climbing a mountain (山) in front of the anthill (an1). He uses a dinosaur bone (〡) as walking stick, and to have better grip he attached a fork (山) to its tip. Unfortunately he accidentally sticks the fork into a receptacle (凵) on the ground of the mountain and gets shocked.

可 = 丁 + 口 : Karl Marx (k) is challenging his abilities (可) in the elevator's living room (e3). He tries to force a nail (丁) into a mandarin (口), just by using his head. On top of that he tries to do so one thousand times, in order to create a bed of nails (mnemonic symbol for 可).

可 = 丁 + 口 : Alternative mnemonic symbol: kebab, from the pronunciation "ke". Karl Marx (k) is preparing a kebab (mnemonic symbol for 可) in the elevator's living room (e3). He also skewers mandarins (口) on the long steel nails (丁) and will only allow (可) his guests to eat the rest of the kebab if they eat their mandarins first.

是 = 旦 + 龰 : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) starts his day in the space station's bathroom (Ø4) with a mug of coffee (旦). Holding a skull (mnemonic symbol for 是) in his hands, he asks himself "to be, or not to be" (是). He wonders if he can make the skull come back to life using lots of coffee, and injects coffee from his mug into the skull using a syringe (龰).

是 = 日 + 下 + 人 : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) watches the Neanderthal Man (人) trying to climb to the sun (日) on a ladder (下) in the space station's bathroom (Ø4). Sherlock is afraid that he'll open the window, so he puts on a big skull (是) and scares him off.

大 = 一 + 人 : The big (大), huge (大) robot (mnemonic symbol for 大) is working out in the ashram's bathroom (a4). He's lifting a flute (一) to which Don Quixote (d) and Neanderthal man (人) are clinging.

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

相 = 木 + 目 : Mnemonic symbol: I take "eye" and "tree" as resembling an ent, an alive tree. Xi Shi (xi) portrays (相) an ent (相) in the anglepod's bathroom (ang4). Unfortunately she's really bad at painting, and her portrait resembles more a Christmas tree (木). The Eye of Providence (目) enters and, just from the shape of the Christmas Tree, instantly recognizes its own portrait (相).

同 = 冂 + 𠮛 : Tommy Turtle (tu) is stapling (冂) a magical scroll (𠮛) to the wall of the engine's kitchen ((e)ng2). On it he wrote that he's looking for two twins (mnemonic symbol for 同).

啊 = 口 + 阿 : Auntie was supposed to meet Albert Einstein in front of the ashram, but Albert is nowhere to be seen. There is just a huge mandarin lying around. After auntie has waited for a long time, she finally decides to peel the mandarin. As she peels of the first piece, Albert Einstein jumps out of the mandarin, shouting "阿姨! Surprise!" Auntie in turn just screams "啊" in surprise as she swiftly suffers from a heart attack.