[quote=@Abillioncats]
[@Guess Who] I don't believe they have actually.

They will all be Onii-chans and Onee-chans, it's just a matter of time.
[/quote]

I vaguely remember an anime character whose sole goal inlife was to accumulate as many oniichans and oneechans as possible. 

Just can'tremember her name or what anime.