Super Sailor Mercury, Super Sailor Jupiter and others in “Unfinished Business”

So that's it. It is why those people from the Dark Moon have been trying to capture you.

Because, in fact, it's the Golden Crystal they're after.

Ah, well. This isn't surgery. All we have to do is beat the Dark Moon with the Golden Crystal.

No, it's not that easy. Pegasus can't release the power of the Golden Crystal, but there is someone who can. We have to help him find the person who can help him release its full power.

Mini Moon, you...?

You knew all of this?

Pegasus has been looking for that person, but he hasn't been able to find him anywhere.

But it's so important! Why didn't you tell us all this before now!?

She couldn't tell you. I made her promise. It is a secret known only the Guardians of Elysion. But I broke the silence and... I revealed the secret to Rini.

Huh?

Because you freed me and helped me find the light I needed when I was bound in the darkness. Because of this, I thought you were the one who could release the full power of the Golden Crystal. But, sadly, you can't.