My spiral into the insanity continues as figurines have sneaked into my house.
Konata on the top of the hexagonal container means nothing, apparently. I think that the product line is made by Good Smile to make school pupils to exchange figurines. Not that I have anything of Miyuki at all.
UPDATE: I was unable to find the product page at first, but Gia had a sister link, which helped. It's in PRODUCTS > OTHER section. By the way, Nendroid Yoko is twice as tall as my Miyuki (100mm vs. 50mm).