Kazuki Nakashima himself wrote short introductions for Ryuuko and SatsukI; they were published with these newspaper ads. Here are the translations:

Ryuuko

Ever since I could remember, I was alone.

I had no advantage but my will to win.

Only I could protect myself.

That was what kept me going.

The living sailor uniform I wear

will see this maiden’s will through.



What’s this living sailor uniform anyway?

That I’m wearing it is the strangest thing of all.

But even so, that’s fine.

As long as I beat these guys,

It doesn’t matter how I look.

That’s the spirit of Matoi Ryuuko.

Satsuki