Why is the middle sister always the best sister?

Name one example besides Nabiki, baka hentai

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>>159808554
ok

That begs the question.

http://www.strawpoll.me/13435910

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In Magical Animu-Land, everyone has either zero, one, or over 9000 siblings.

>>159811229
I guess the best one would be around the 4500th then

>>159809416
Not blood-related obviously as to avoid that whole incest and inbreeding thing

>>159809144
you mean the traitor to their leader and her own blood?

>>159811229
Is this a game, line of doll?

I swear in every japanese group of 3 sisters, the oldest is a proto ara ara housewife and the youngest is the tsundere little shit, bonus if twintails.

>>159813439
hey, it was Rossiu who kept things running.
And when did she ever betray her family?

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>>159808554
probably the strongest instance of this rule

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shit, I thought of an undeniable counter-example