It is Shiro and Kuro!'White' and 'Black', respectively.We're the Abyssal Twin Himes!We are the Abyssal Twin Himes.You don't have individual names...?How simple of you...We don't.Then, these girls will be...Shii-chan?Kuu-chan!I'm Shiro!I'm Kuro!This girl is Shii-chan!And Kuu-chan!You're not one to talk, Teetoku-chan...What if we picked names for you?Those are for cats...
Indeed they are.Kuu-chan♪Kuu-chan♪Them saying "Kuu-chan" is somehow awkward...Shii-chan♪Shii-chan♪Shiro!Kuro!Twins!
They are twins!
Puchi 963 Clear as Black and White
"Shirokuro tsukeru", lit. "to attach/tag with black & white", means "to clear up/settle/clarify" a matter, usually as right or wrong.