Disclaimer: I don't own either, mores the pity.
“So, this is the future.” she snorted at the unbidden thought. Even though she had lived every day of the past few hundred years Buffy Ann Summers, every now and then, still felt surprise. It was just so... bright and shiny! Of course humans had to go through the Eugenics Wars, World War III, and The Cleveland Hellmouth opening for a full year.
Willow figured out how to kill two birds with one stone to close all the Hellmouths and get rid of most Demons. She got with the Devon Coven, The Charmed Ones, and other assorted witches, warlocks, and Wizards. Yes, Wizards using Wands that lived on the same planet but didn't deign to mix with 'muggles'. Yeah, that didn't last long.
The Magic users were able to reverse the polarity, or something like that, of the Hellmouths. Several standing tornadoes formed all around the world that day. Each was stationary above a Hellmouth pulling demons, monsters, goblins, and vampires into their stygian depths. Balance demons, half-demons, and vampires with a soul were not affected. It was all very Jumanji.
All Slayers were called in to guard the Magic users arrayed at each Hellmouth. Near as Willow could figure that is what gave everyone involved something akin to Eternal Youth. So, here she was, a couple centuries old Slayer working for Star Fleet, training the youth of the day. Having heard of this particular Cadet was taking the test... again. Buffy couldn't resist she had to tag along as an observer.
Kid didn't know when to quit while he was behind.
Buffy liked him though, he reminded her of a cross between Xander and Angel. Now, a few minutes into the simulation, she was hiding her smile while stifling a chuckle at hearing a fellow instructor exclaim, “Did he say don't worry about it?”
Another instructor, one she thought was too narrow minded, responded, “Is he not taking this seriously?”
Buffy had to look away from the observation window to hide her growing mirth.
“Finally!” she happily thought, “Someone to shake up the establishment. You go kid!”
Controlling her breath Buffy struggled to bring herself under control. She turned around just in time to hear the cadet at Navigation report, “Our ship is being hit. Shields at sixty percent.”
The 'Rock Star' in the Captain's Chair said, “I understand.” As he reached down grabbing an apple he had secreted on his seat.
The Navigator asked, “Well, should we, I don't know, fire back?”
Cadet Kirk answered with one word, “No.” then proceeded to eat his apple. Quite noisily. Buffy could feel the laughter threatening to bubble up out of control again.
“Of course not.” the navigator responded incredulously.
Then the power went out.
The narrow minded instructor, Buffy could never remember his name, exclaimed, “What is this? What's going on?” as the power came back to full.
“Oh My GOD! What a dork!” Buffy shouted in her head. Ignoring her fellow instructor, one Lt. Commander Buffy Summers in charge of Security, watched in gleeful surprise as Jim Kirk upped the ante. He was fully into Rock Star mode now. She watched him point out the Klingon’s shields were down, ordering one photon apiece. When the Cadet added that he didn't want to waste ammunition Buffy almost lost her control.
Biting her lip, almost drawing blood, she coughed to cover her laughter enjoying his antics. Strutting around the Bridge she couldn't help but to compare him to a peacock. Taking another huge bite of his apple after ordering his crew to begin rescue operations almost did her in. His boasting of all enemy craft defeated, no one being injured, and the successful rescue of the Kobayashi Maru reminded her of nothing more then a Bull Ape beating its chest.
Another stuffed shirt instructor commented to the only alien instructor in the control room, “How the hell did that kid beat your test?”
Mr. Spock, a vulcan-human hybrid, stoically answered, “I do not know.”
Buffy focused on one James Tiberius Kirk whispering under her breath, “Oh, this is one to watch!”