"cover" radical in Chinese characters (Kangxi radical 14), occurring in 軍|军[jun1], 冠[guan1] etc, known as 禿寶蓋|秃宝盖[tu1 bao3 gai4] or 平寶蓋|平宝盖[ping2 bao3 gai4]
Mnemonic symbol: 冖 shall be represented by a saucepan lid. Marilyn Monroe (mi-) wants to use the bathroom in the space station (Ø4), but the door is broken! She tries to cover herself with a saucepan lid (冖) instead.
Mnemonic symbol: this character looks a bit like a bat, and bats come out of their caves at dusk. I could see the upper left 丿 as part of the bat's right wing, ㇇ as the body/head and 丶 as the eye of the bat.
Xi Shi (xi) goes out for a space walk in front of the space station (Ø1) in the evening (夕), where she observes a space bat.