要角

要 = 女 + 覀 : Bessie Coleman shows Maud Younger how to use a knuckle duster in the aorta's bathroom. She says it's very important and that Maud will have to get one herself.

角 = ⺈ + 用 : Joan of Arc finds a hurt crane in a corner inside of the aorta. The crane hurt itself with a sharp horn earlier, which is now lying in another corner. Joan of Arc pulls out her first aid kit and administers first aid.

角 = ⺈ + 用 : Mnemonic symbol: a horn.

角 = ⺈ + 用 : Zeus is practising his theatre role just inside the elevator's kitchen: he's gonna play the dying swan. A crane flies by and sees him, thinking Zeus is really dying, and instantly starts administering first aid with a first aid kit he coincidentally carried around.