Well, it's something I've noticed recently (well, I've been noticing this for a while), and pair numbers doesn't work for Hello Project. I mean, all groups always lose a member when the number of their members is pair.
The first and most clear example is Berryz Koubou :
They debuted with 8 members:
http://img.wuliaoo.c.../berryzkobo.jpg
But...
The first and most clear example is Berryz Koubou :
They debuted with 8 members:
http://img.wuliaoo.c.../berryzkobo.jpg
But...