系

县 = 且 + 厶 : Marie Curie (xi) and the county manager of her home county are manufacturing maps of her home county (县) inside of the anthill's bathroom (an4). The county has a very special form which you can reproduce by smashing a fake nose (厶) with a shelf (且).

系 = 丿 + 糸 : In the space station's bathroom, Marie Curie found a new binding mechanism in chemistry. To demonstrate her findings, she binds two bananas together with a silk scarf. She celebrates her findings by shaking her own hand over her head.

系 = 丿 + 糸 : Mnemonic symbol: As this is the second character in 关系 (guanxi), I'll use shaking hands as the symbol for 系.

孙 = 孑 + 小 : Susan Saint Bernard (su) was lucky enough to catch and eat a mosquito (孑) in front of the encampment ((e)n1), but two weeks later, the mosquito's grandson (孙) comes to fight Susan Saint Bernard and avenge the death of his grandfather. Susan Saint Bernard is a little embarrassed and offers a daisy (小) as peace offering.

孙 = 孑 + 小 : Susan Saint Bernard (su) was lucky enough to catch and eat a mosquito (孑) in front of the encampment ((e)n1), but two weeks later, the mosquito's grandson (孙) comes to fight Susan Saint Bernard and avenge the death of his grandfather. Susan Saint Bernard is a little embarrassed and offers a daisy (小) as peace offering.

繁 = 敏 + 糸 : Frankenstein's Monster (f) sneezes without end in the anthill's kitchen (an2) after coming in. He doesn't know that he's allergic (敏) against his fine silk scarf (糸). How should he, since he doesn't have an immune system it seems complicated (繁) how this allergy should even work.