獨個

独 = 犭 + 虫 : Everyone has left the space station, only the animals are left: Doggy Dog (du), the dachshund (犭) and the mosquito (虫). They have noone who throws them a stick or exposes their bare body parts to bite. All alone (独), they wait in the space station's entrance (Ø2).

个 = 丨 + 人 : Mnemonic symbol: Neanderthal Man (人). Neanderthal Man (人) needs to use the elevator's bathroom (e4) but it's occupied by Guy Fawkes (g), and there's only space for one individual (个). Impatiently Neanderthal Man knocks on the door using his dinosaur bone (丨).