I don't own Sailor Moon or Kingdom Hearts.

Aqua was trying to protect a little girl about four years old from Unversed. The girl had red hair, and she was wearing a white dress with a bit of purple. "We gotta help them! Come on!" Mickey shouted. Jessica nodded. Mickey and Jessica summoned their keyblades and jumped at the Unversed.

"Jess!?" Aqua gasped in surprise.

"Hurry! You gotta get that girl to someplace that's safe!" Mickey ordered.

"Who are you? Why is Jessica with you? Why do you have a keyblade?" Aqua asked.

"Fewer questions, more action. Let's get them," Jessica stated. Aqua picked the girl up and carried her to a safe place. It wasn't long before Aqua came back to help Jessica and Mickey out.

"Everything alright?" Mickey wondered. Aqua nodded.

"Let's get 'em!" Mickey urged.

"Right," Aqua agreed. Jessica, Mickey, and Aqua fought off the Unversed. After the battle, Aqua told the girl that she could come back. The girl ran back to Mickey, Aqua, and Jessica. Aqua kneeled down while facing Mickey. "Thank you. My name is Aqua, and I train under Master Eraqus."

"And I'm Mickey. I used to be Master Yen Sid's apprentice. I came back to him for some more training," Mickey explained.

Aqua nodded and turned to Jessica. "What are you doing here? You should be at home training. Why did you leave?" Aqua questioned.

"I wanted to prove that I'm just as good as you. Aqua, I know you don't understand this, but I can't go back. Not yet. I have something I need to take care of. There are people I need to find. I'm sorry, Aqua."

Jessica turned and started to walk away, ready to run if Aqua decided to come after her. Instead, she heard Aqua say one word. "Usagi."

Jessica turned around and faced Aqua. "What did you just say?" Jessica inquired, stunned.

Suddenly there was a light coming from Mickey's pocket. "Oh no! Not now!" He turned into a ball of light. "I'll be okay. See you real soon!" He called to Aqua and Jessica as he flew up to the sky.

Aqua stood up. "I remember now, Usagi-chan. I'm Sailor Mercury." Jessica was speechless. Aqua smiled and knelt back down. "I sense light in this girl. That's probably why the Unversed were attacking her," She said.

"Your right. It's strange. I can't feel any darkness in her heart," Jessica added, walking over to Aqua and the girl.

"Here." The girl held out two bouquets of flowers to Aqua and Jessica.

"Are these for us?" Aqua smiled.

The girl nodded. "I picked you these flowers. Thank you for saving me." Jessica and Aqua took the flowers.

"They're lovely. Your so sweet," Aqua commented.

"Thank you," Jessica thanked.

"My name's Kairi. Nice to meet you," The girl introduced.

"Nice to meet you too. I'm Aqua, and this is Jessica. Kairi, about that light-" Aqua started.

"Kairi!" A voice interrupted. The girls turned their heads to see an elderly woman.

"Oh, Grandma!" Kairi exclaimed.

"Wait, Kairi. Just a second." Aqua touched Kairi's necklace. A light surrounded it and vanished. "I just cast a magic spell on you. One day, When you're in trouble, the light within you will lead you to the light of another. Someone to keep you safe," Aqua explained.

"Thanks." Kairi ran to her Grandmother. Aqua stood up.

"Is it really you, Mercury?" Jessica asked.

"Yes," Aqua answered.

"How come you're older than me?" Jessica groaned.

"I don't know," Aqua sighed.

"Are you going to make me go home?" Jessica wondered.

"No. I understand that you have responsibilities. The others are still out there somewhere," Aqua stated.

Jessica gasped. "Ven! He went after a giant Unversed! We gotta go help him!"

Luna came out of her backpack. A pen appeared in Aqua's hand. "Mercury, this is your transformation pen. You should try transforming," Luna explained.

Aqua nodded. "Mercury Power! Makeup!" Aqua transformed into Sailor Mercury. "Your turn."

Jessica nodded. "Moon Prism Power! Makeup!" Jessica turned into Sailor Moon. "Let's go help Ven!"

They went to look for Ventus. Eventually, they saw Terra and ran to him. Only seconds later, Ventus came running to them. "Ven," Terra, Sailor Mercury, and Sailor Moon said simultaneously.

"Terra, Jessica. Wait, who are you?" Ventus asked Sailor Mercury. Jessica was about to answer him, but the Unversed that Aqua, Ventus, and her saw earlier came to where they were. The Unversed was in three separate parts. It connected itself into one giant Unversed.

Sailor Moon, Ventus, and Terra summoned their keyblades. "Mercury, I use my keyblade in place of my moon rod. It might be the same with your attacks," Jessica informed Sailor Mercury.

"Okay. I'll keep that in mind," Sailor Mercury replied.

Terra and Ventus started fighting the Unversed with their keyblades. Suddenly Jessica had an idea. She held her keyblade up and started twirling it. "Moon Spiral" She Spun in circles and stopped. "Heart Attack!" The attack weakened the Unversed.

"My turn. Mercury" A ball of water formed in her hands. "Aqua" The water started spiraling around her. "Mirage!" The water exploded on the Unversed.

Sailor Mercury summoned her keyblade. Like Sailor Moon's, it was different from her normal keyblade. This one was all blue except for the blade. The blade and key chain looked like a book. "Ven now!" Terra shouted. They all slashed at the Unversed, and it faded.

Ventus turned to Sailor Moon. "Jess, who's this?" Ventus wondered. Sailor Mercury turned back into Aqua. "Whoa, you can do that too? Cool!"

"Would someone tell me what's going on here?" Terra huffed.

"Sorry, Terra. We can't tell you. All you really need to know is that Aqua and I gain special powers when we're in that form," Jessica explained.

"Okay," Terra said, a bit put off by what his friend did.

"Oh yeah. I got you these tickets." Ventus pulled out four cards from his pocket and handed one to Jessica, Aqua, and Terra.

"For what?" Terra wondered.

"Lifetime passes to Disney Town. He said-" Ventus paused. "He said to take a friend and two grown-ups."

"You mean us?" Aqua smiled. Terra and Aqua laughed a little before her expression turned serious.

"Listen to me, Ven. We need to get you home," She stated.

"It's okay, Aqua. Trust me. That guy in the mask is history. He'll never bad mouth Terra again," Ventus assured her.

Terra grabbed Ventus's shoulder. "You saw the boy in the mask, Terra questioned.

"Y-Yes," Ventus stuttered.

"Vanitas," Terra muttered and let go of Ventus. "Ven, Jess, you both let Aqua take you home," Terra ordered.

"No way. I wanna go with you guys," Ventus whined.

"Terra, I'll take Ventus home, but Jessica stays with me. We have something that we need to do together," Aqua explained.

"They can't come. We have a dangerous task ahead of us. I don't want either of them to get hurt," Terra stated.

"And what is this dangerous task, Terra? It doesn't sound like what the Master told you to do," Aqua pointed out.

"It might be a different route, but I'm fighting the darkness," Terra replied.

"I'm not so sure. I've been to the same worlds as you, and I've seen what you've done. You shouldn't put yourself so close to the darkness," Aqua mentioned.

"Listen to yourself, Aqua! Terra would never-"Ventus shouted.

"You mean you were spying on me? Is that what he said to do? Master's orders?" Terra accused.

"He was only..." Aqua trailed off.

"Aqua," Ventus sighed.

"I get it," Terra huffed before he and turned to walk away.

"Terra," Ventus tried.

"Just stay put! I'm on my own! Alright?!" Terra yelled before he started to walk away.

"Terra, please listen! The master has no reason to distrust you, really! He was just worried!" Aqua called out to Terra, but Terra just kept walking. Jessica didn't know who to turn to. There was Terra, who was in a bad mood, Aqua, who had spied on Terra this entire time, and then there was Ventus, who had to go back to the castle. She realized that the only person she could trust was Luna.

"Your awful Aqua," Ventus grumbled.

"Aqua, why?" Jessica asked.

"So now you know the truth. But the master loves Terra, and you both know that too," Aqua reminded.

"Were you also ordered to take us home?" Jessica wondered. The next moments of silence spoke louder to Ventus and Jessica than any words ever could.

"Aqua, now that you're a keyblade master, you let it go to your head. I'm gonna go find Terra." Ventus ran in the direction that Terra walked off.

A tear slipped down Jessica's cheek. "Ami-chan, Why?" She walked away. After she was out of earshot, she started singing.

"I have to find a way,
To make this all okay
I can't believe this small mistake,
Could've caused so much heartache
Oh why?
Oh why?
Losing promise
I don't know what to do
Seeking answers
I fear I won't get through,
To you
Oh why?
Oh why?

Luna came out of her backpack. Jessica sat down. "Oh, Luna, what do I do now?" Jessica sobbed.

Wow. This one was a really long chapter. The name of the song Jessica sang was I Have to Find a Way, from the last episode of season 3 of My Little Pony: Friendship is Magic.

Please review. Tell me what you think of Aqua as Sailor Mercury. From now on, the Sailor Guardians will all be either Disney characters or Kingdom Hearts characters aside from one. I already know who I will have for each of the Sailor Guardians. I considered having Elsa be Mercury because of her ice powers but decided against it because she looks nothing like Mercury. The other Sailor Guardians will not be on here until later. (Unless I come up with a way that they will be on here sooner.)