The sisters' downstairs neighbour is a woman who constantly wears sunglasses and is apparently abysmally bad at housekeeping. It is unclear what kind of work she does, but she is apparently well-off, as could be seen when Ky� found a wallet Ranko had dropped. Asu is the only one to have seen Ranko without her sunglasses, which make her seem somewhat suspicious. Asu claims the 'neighbour onee-san' looks like a nice person without them. When she learns of the sisters' situation, she warms up to them, even lending Ky� one of her suits and fixing her makeup when the elder sister wants to look a bit more mature for Asu's school's open house.