Sunset’s jaw dropped as she looked at all of Twilight’s equipment. “Are we gonna need all this?” she asked.
“Probably not,” Twilight replied. “But it never hurts to be prepared.”
“So, what do we do first?” Sunset inquired.
“Well, I thought we could start with a physical. That way we can see if there are any obvious differences,” Twilight said.
“Um, okay,” Sunset said. She sat down in one of the chairs as Twilight gathered the supplies she needed.
Twilight approached with a thermometer and Sunset opened her mouth. Twilight frowned as she took the reading. She wrote it down and asked, “Sunset, are you feeling all right?”
“I’m feeling fine,” Sunset replied. “Why?”
“Your temperature is 100 degrees,” Twilight said. “I just want to make sure you’re not sick.”
“That’s a normal temperature for ponies. Is it not for humans?”
“No. That’s a fever for humans. Now I’m curious about your other vital signs.”
Twilight continued her checkup. Heart rate, blood pressure, reflexes. Every reading was correct for a pony, but not a human. “I guess I’m not as human as I thought,” Sunset said.
Twilight didn’t respond right away. She ran her hands along Sunset’s arms, legs, and back to feel the bones. She opened Sunset’s mouth and examined her teeth. Finally, Twilight sighed, “I don’t understand. Your vitals say you’re a pony, but all other physical signs point to you being human. Your skeletal structure feels right and you have the right number and kinds of teeth. What was it like when you transformed?”
“It’s hard to remember. Going through the portal is really disorienting. It didn’t hurt, but I did feel kinda sick after,” Sunset explained. “The weird thing is it gave me clothes. I wasn’t wearing any when I went through.”
“So the portal helps you blend in?” Twilight asked.
“That seems reasonable. But does that mean I’m a pony or a human?”
“You seem to be both. That type of hybrid shouldn’t exist, but you can’t argue with the evidence.”
“There are lots of things that shouldn’t exist here that are common in Equestria.”
“I guess. These results are fascinating, but I wish I had more points of data.”
“D’you want me to write to Princess Twilight? Maybe she and her friends wouldn’t mind coming over for some experiments.”
“You would do that for me?”
“Of course, you’re my friend.”
The two smiled at each other. Sunset wasn’t sure why, but seeing Twilight’s smile made her grin even more.