Hotel Transylvania was in its usual hustle and bustle. Wayne was chasing his puppies, Murray was entertaining guests with his stories, Frankenstein was helping the staff with their luggage, and Griffin's voice, invisible as always, echoed through the lobby, good-naturedly teasing everyone.

Dracula watched the scene with a sigh.

"For once... everything seems quiet."

At that moment, the hotel's gigantic doors swung open.

The first to enter was a warrior, over six feet tall. Her turquoise-blue skin, long, fiery red ponytail, and eyepatch over her left eye made her unmistakable. Her single golden eye shone with enthusiasm, while her athletic, heavily muscled physique reflected years of training as Captain of the Royal Guard. She wore her battle-scarred blue and black armor, and carried a long silver spear casually on her shoulder.

"WOAH! THIS PLACE IS AMAZING!”

Papyrus, Sans, Alphys, Toriel, Asgore, Frisk, Chara, and Monster Kid entered behind her.

“WHAT AN AMAZING HOTEL!” Papyrus exclaimed.

“Heh... I bet the kitchen is the first thing you'll find,” Sans commented.

Monster Kid was running everywhere, while Alphys stayed close to Undyne. She noticed immediately, gently took her hand, and smiled.

“Don't worry... I'm here.”

Alphys blushed.

“Th-Thanks...”

A moment later, Undyne nudged Frisk lightly.

“Just one rule: no Genocide Route this time, okay? I don't want to get evicted before I check in.”

Frisk laughed.

“I promise. Pacifist only.”

Chara smiled slightly.

"Too bad... I already had a plan."

"Heh..." Sans snorted. "Let's start with the buffet, come on."

That's when Johnny emerged from the reception area, speechless.

"Drac! It's them! The cast of Undertale!"

"Really?" Mavis asked, curious.

"Of course! They're incredibly famous in the human world. And Undyne is one of the most beloved warriors!"

Undyne laughed heartily.

"HAHA! Then I'll have to live up to my reputation!"

Wasting no time, he placed his spear next to the bar and sat down.

"A nice beer... and the biggest dish on the menu, please!"

Drac watched the scene with a resigned smile.

"Welcome to Hotel Transylvania. I have a feeling this vacation is going to be anything but peaceful."