The Pinyin final "Ø4" is used in the second half of Pinyin syllables. In MandarinBanana's mnemonic system, the second half of a Pinyin syllable is always represented by a location. You can visit the Pinyin index to see all Pinyin syllables from this mnemonic group, or to see all Pinyin syllables "Ø4" can appear in.
“Ø” as the second half of a pinyin syllable means in the Marilyn Method system that there simply is no second half. Pronounce the start of the syllable on its own without dedicated ending.
The only exemption is “er”, which is arbitrarily assigned to the initial syllable “Ø” and ending syllable “Ø”.
Scene background: the cramped, functional interior of the International Space Station's hygiene module. The space is cluttered with exposed wiring, conduit, beige padded walls, and Velcro strips holding various equipment. In the mid-ground is a complex vacuum-assisted space toilet contraption with suction hoses and foot restraints. In the background, a cylindrical, curtained shower enclosure unit. Hygiene supplies, toothpaste tubes in foil bags, and towels float suspended freely in zero gravity. Small circular portholes reveal a distinct view of black outer space and stars.