Dipper started following the trail of aqua and pink light left behind. He followed it till he came to a lake the trail went half way across the lake.
"Great she goes the one place I can't go" dipper said aloud
Dipper took out the journal and began rummaging through the pages. He stopped when he found a page describing a small light blue berry that allows you to breathe underwater. It said they usually grow around cattails. He saw a bunch of them near the edge of the lake and began to search for the berry described in the book. He eventually found it; he grabbed a few just in case. He ate one of them and put the rest in his pocket. He then jumped in to the lake. At first he held his breath then allowed the air to escape his mouth, and breathed in water. He resurfaced and followed the trail till it ended. He then went below the surface and swam deeper and deeper. As he did this he ate another one of the berries. As he swam deeper and deeper he expected it to get darker, but it didn't instead it got lighter. He continued to swim downwards till he saw a castle entirely made of shells. When he got close enough he saw siren swim into it and closed the door.
Siren went into the castle and drained the water from the inside. After it was all gone she dried her fins and changed back into her original form. She began to snap her fingers and the hall she was in became decorated with expensive paintings from equestria. Her favorite one was a one of her and her parents before they died. A tear ran down her face.
"I miss you" siren said in a whisper
She then heard a knock at the castle doors. She wiped away the tear and walked to the door. She opened the huge doors with her magic. Even though there was water outside none of it could get in because siren cast a magical barrier to keep it out. She opened them to reveal dipper swimming outside. Siren was shocked by this because dipper was a human and humans can't breathe underwater.
"DIPPER! How did you get here" siren asked
"I used these, they allow you to breath under water" dipper said showing her the berries
"Oh" siren said
"Nice castle, where did you get it" dipper asked stepping through the barrier
"I made it" siren said
"Whoa! You made this! How" dipper asked surprised
"I used my magic" siren said casually
"WOW! Your magic can do that" dipper said still surprised
"Ya alicorn magic can do almost anything, the only magic that is more powerful is discords" siren said
"Whose discord" dipper asked
"He's the spirit of chaos and disharmony, he used to be a villain but was reformed about 15 years ago" siren said
"Wow" dipper said
They started to walk down the hall. As they passed by the picture of siren and her parents in there pony form
"Who are they" dipper asked pointing at the picture
"My parents and me" siren said sadly
"Oh, where are they back in equestria" dipper asked
Siren winced
"No they died protecting me when I was only 9" siren said sadly
"Oh, I'm sorry" dipper said sympathetically
"Its fine" siren said
They continued to walk down the hall. They passed by a picture of all of the alicorns.
"Who are they" dipper asked again
"There all the alicorns, the white one is celestia she controls the sun, the dark blue one is Luna she controls the moon, my aunts. The pink one is cadence she is the princess of love. And the light pink one is her daughter flutterby lily, and then the purple one is twilight she is the princess of friendship. And the other purple one is her daughter twinkle. And then there's me" siren said
"Wow so in equestria the planet doesn't rotate around the sun, the sun rotates around the planet" dipper asked
"Yes. Dose earth not work like that" siren asked
"Yes. It's the other way around" dipper said
"Fascinating, earth is so different then equestria" siren said
Lol princesses
That's all
siren out