That girl's called Suu-san because she's Suzuran?

That's right, Lovely, isn't it?

And I'm Hii-chan?

Because you're Himawari. Sunflower.

But Mommy is like me, but you don't call her like that?

Now that I think, you're right. Then why she's called Yuuka, I wonder?

In the Outside world there's a plant called eucalyptus and certain animals, koalas, are quite fond of it... ユーカリ (Yuukari) - eucalyptus.

Reimu, thanks for watching over these two a while ago.

By the way, ever since that time, they've had a fad of yelling "koala game" and clinging to me like this. Do you happen to know, what might it be?