Rarity trotted to the door and open it, reveiling Rainbow Dash, her eyes still a dark red.
"Rainbow, don't come to me right after you've fed! You're going to get blood on my carpet!" said Rarity.
Rainbow extended her fangs, red with blood.
"Too bad."
She sat there for a minute before making a hoof gesture to Rarity, smiling. Everypony seemed to forget about that.
"...oh, right. Come in, Rainbow Dash." she said.
Rainbow stepped in, looking around.
"You've kept this place nice and tidy." she said.
"I know you aren't here for a new dress, so why are you here?"
"Sinweaver demands his blood price. I need you to lure some ponies to a secluded place so that me and you can-"
"I thought we said we would hold back." Rarity said bluntly.
"I decided to embrace it. I'm a vampire, and I need blood! And you're siren. You need ponies! If we keep holding back like this, we get weak and we die."
Rarity was a siren from birth. Rainbow Dash was bitten 5 years ago and thus became a member of the damned, a vampire. She was already the fastest thing in Equestria...but now, as a vampire, she was faster. Also, she was not weak to sunlight, a rarity in vampires.
"You know how much I don't want to do this. It still gives me nightmares, the times I have eaten harmless ponies."
"You think I want to suck blood from ponies? I don't. But it's the price to pay with my undead immortal super speedy awesomeness. I need it, and so do you. Come on, Rarity. Embrace it.
"...very well. I'll do it."
"Great. 9:00 tonight. If you no-show, I swear to the Sinweaver..."
"I won't. Promise."
A satisfied Rainbow Dash left the buliding. Tonight, she would feed.
"Alright Rarity, sing your tune. I get half, you get half. Simple enough? Btw, if you try to eat somepony while I'm sucking their blood, I am so gonna kick your ass." said Rainbow.
"No need. I brought a bag of 700 Skittles. You try to attack me, Rainbow Dash, and I spill them on the floor. Remember that April Hooves prank?"
"That wasn't funny! I had Wonderbolt try-outs that day! I was counting those apple seeds for TWO HOURS!"
When becoming a vampire, Rainbow Dash had developed a severe case of Arithmomania. On April Hooves last year, when Rainbow had crashed at Applejack's, AJ had put 14,000 apple seeds in a bag by her bedside. When she woke up, Rainbow had no choice but to count every single one of them. Applejack later apologized when she learned that Rainbow had a Wonderbolt try-out scheduled for the day and she had missed it when she was counting them.
"Okay, my earplugs are in. Sing, so that Sinweaver may get his blood price and that I can feed."
Rarity sighed and then began to sing. Rainbow couldn't hear it, but she was sure it was the most beautiful thing in the world. A pony entered the door, a big stallion.
"Mine!" screamed Rainbow running into him and pinning him against the wall before entering her fangs into his neck. The life gradually sucked out of him. When she got up, her eyes were blood red and blood was all over her face.
"Ahhhhh..."
"I get the next one, I suppose." Rarity said, singing her song again. When the next one came in, a mare, she devoured her wholly.
"You were right. That IS disgusting. Well, me next!"
Rarity sung once more, revealing a filly. Rainbow pounced upon her and was about to sink her fangs in when she saw that the filly was wearing a cross necklace.
"Really? You REALLY had to wear a cross necklace? That's not even in style! She's yours, Rarity, but I get the next two! Cross necklace..." she said, flinging the filly to Rarity, which she devoured once more.
"Okay, sing."
Rarity was about to open her mouth when the Applejack came into the room.
"I cannot believe ya'll!" said Applejack, an angry look on her face.
"Come on, AJ! You don't ever hunt?" asked Rainbow Dash.
"I do, but not in mass numbers like this! This is sick! I thought we agreed to hold back on our...afflictions!"
"We have to embrace it, AJ! Stop being a baby about it and-"
Rarity spilled the Skittles to the floor.
"Celestia Dammit! 1. 2. 3. 4. 5. 6. 7-"
"As much as I hate to say it, Rainbow Dash is right. We can't hide it anymore. I mean, we have to hid it, but not hold it back. It's needed to live! You don't feel the urge to transform during a full moon?"
"...I do. But I try to hold it back, and-you REALLY can't stop counting those, can you?" asked AJ.
"51. 52. 53. 54. 55-" Rarity used her horn to levitate them back in her bag, then concealing them.
"If you want me to shut up, just tell me. That's not cool, man."
"But it's funny." said Rarity.
"It is not! I always have to-"
Twilight Sparkle entered the room.
"I smelled blood." she said, extending her fangs.
"You're late, Twilight. We were just making Rainbow count Skittles." said Rarity. Twilight started laughing.
"Lucky..." muttered Rainbow.
Not all vampires have the same weaknesses. While Rainbow had Arithmomania, needed to be invited to go somewhere, and was weak to crosses, Twilight wasn't weak to any of them. A vampire's weaknesses come from the vampire who bit them. Twilight was weak to silver, garlic, and decapitation. Rainbow, if decapitated, would be merely paralyzed, while Twilight would die. Also, all vampires were weak to fire and wooden stakes.
"Well, too bad I missed it. Rainbow, we need to go to the meeting tonight."
"Ugh, I hate vampire meetings! They're so boring!"
"What are those like, anyway?" asked Rarity curiously.
"They just talk about how Sinweaver is the patron and that we must obey him and all that stupid but vital crap." Rainbow responded.
"Let's go, before we get punished again." said Twilight.
"Fine. See you guys later." they exited out the door. Rarity and Applejack were all that remained.
"Should we follow them?" asked Applejack.
"Are you out of your mind!?" asked Rarity.
"Hey, it's not like they'll know a werewolf and a siren are among them! Plus, I'm a little curious to see how this goes." said AJ.
"Curiosity killed the cat." said Rarity. AJ smiled.
"But I'm a wolf, Rarity." she replied.
.
