Starlight Glimmer: The Mane One

"Where are we?"
"This is like, the TOTAL OPPOSITE of cool right now."
"I CAN'T FEEL MY MANEEE"
"I-I'm scared..."
"Don't worry Fluttershy, I got ya!"
"Hey girls, she's waking up!"

Starlight opened her eyes, groaning while rubbing her hurting head. She found herself outside the castle laying on the grass surrounding it. She looked at her own hooves. Yup, still her own normal hooves. She shook her head again, taking a better look around. Looking closer at Twilight's castle she realized that it had a big hole in it's side. She could see the library she was in before, which confused her. What made a hole that big? Then she looked down, realizing she was a good thirty feet off the ground. She got frightened at first, thinking she was going to fall.

"Woah! Wait.." Moving her feet along the ground she noticed she was standing perfectly fine. The realization then hit her that the castle looked a lot smaller, she was just half it's size! Suddenly, she heard Pinkie Pie's voice.

"I've never seen the castle from THIS view before, wow! So cool!"

Starlight looked around. It felt like Pinkie Pie was speaking right into both ears at once, but she couldn't see her anywhere. She couldn't find any of her friends. "Wh-Where are you all?" she asked in alarm.

She heard Applejack respond in a similar way. "Well, I think we're all seeing exactly what you're seeing, Starlight. It's like we're inside your head."
"Oh." Starlight nodded.
...
"WAIT WHAT?!" She yelled. She looked back at her self, realizing her giant body also had a giant set of wings as well, getting even more alarmed. "When did I get THESE?!"

"Calm down everypony" Twilight said from within her head, "I think we've all somehow merged into Starlight's body. If my assumptions are correct, we're all talking inside Starlight's consciousness."

"Okay Starlight, what n' tarnation did you DO to us?" Applejack demanded.

Starlight winced, it wasn't easy to get used to hearing her six friends talking over each other inside her head. "I'm sorry, I'm sorry please! I didn't mean for this to happen at all. I kinda..made a spell to look into ponies minds. Y'know, to uhm, to see what their boundaries are?"

Everyone groaned. It hurt Starlight a little.

"I'm pretty sure that meant NOT using magic!" Rainbow Dash scolded. "How am I supposed to fly when I'm stuck inside your big head, Starlight? This is totally uncool."

"I didn't mean for THIS to happen!" Starlight sobbed. She sat on the ground suddenly, causing the ground to shake, and pressing her hooves against her face trying to keep back her tears. This was an extreme emotional whiplash to be happening on her birthday.

"There there, Starlight," Fluttershy comforted from seemingly nowhere, "I believe you. I mean, maybe this isn't that bad. I'm sure you'l keep us safe." This cheered Starlight up enough to stop crying. Suddenly she felt her right arm come up and wipe her tears even though she didn't think about doing it.

"F...Fluttershy, did you just move my arm?"
"I..I think so. You just sounded so sad I wanted to wipe your tears for you." Fluttershy admitted.

Twilight had never seen or experienced anything like this before. "This is interesting, it seems that if we try hard enough we can take some kind of limited control over Starlight's body. Let me try something..."

Starlight sat upright stiffly, feeling extremely uncomfortable that her friends were treating her like some kind of puppet. Suddenly she saw her two arms spread out in front of her, and then pull back to her chest, giving herself a hug. It made her blush and feel warm inside.
"We still love you, Starlight." Twilight said. "We're going to have to keep it together if we're going to get through this eitherway."

"Thanks Twilight, Fluttershy, that made me feel a lot better," Starlight smiled, standing up on her four massive hooves. She looked at the castle next to her, clearly too small for her to fit inside. "I must have grown from absorbing you all, I'm kinda huge. I don't think going into town is a good idea. I don't know what to do."

Twilight thought to herself, floating weightlessly inside the black void of Starlight's consciousness, seeing two big circular screens that broadcasted Starlight's vision. "Well, if you used some kind of morph spell to do all this, it should wear off. Morphing spells last at around a few days, tops. Let's just make the most of it. I mean, it's still your birthday, right? We can still have fun and... do...things, I guess?"

Their conversation was interrupted by the castle doorbell being rung nearby, along with multiple tiny knocks on the main door in front. Starlight's massive body was hidden behind the larger castle.

"Oh no!" they all thought in unison. "Who could that be!?"