Chara laughs as he glares at Luna. He turns to see Frisk standing firm not looking away from him. He chuckles as he said with his eyes glowing bright red.
"You are all fools! You all should be burning in... huh?"
Black goo liquid began to wrap around Luna's leg and quickly consuming her. Luna started to fight it but it was no use. The black goo kept on wrapping itself around and soon drag her into a black pitiful world known as the Void.
"Luna!"
Chara eyes widened in shock, "I did not see that coming."
Frisk looks straight at Chara saying, "don't lie, Chara! Where is she?!"
Chara looks at Frisk yelling, "you think I was the one who causes whatever that was?! You got to be kidding me?!"
Frisk sighs seeing Chara was telling the truth, "alright if you don't know then could you possibly locate where she is?"
"Do I look like a magical being to you? I have no fricking clue to where the hell she went!"
Sans appears but couldn't find Luna in sight, "where's Luna?"
Frisk sighs saying, "I don't know some kind of black gross stuff consumed her."
Sans glares at Chara as he closes his eye sockets and opens his right showing his blue flaming pupil, "where is she?!"
Frisk looks at Sans, "Chara never knew this would happen."
Chara crosses his arms looking at Frisk, "wow, never thought you would actually defend me here."
Sans sighs as his white pupils appear in his hollow sockets, "she must be somewhere in the Underground. I'll use my shortcuts to find her and as for you brat" glares at Chara, "I'm taking you with me so you ain't causing any more troubles for any of us."
Chara shrugs, "I had a funny feeling you would."
"I came as fast I can when I heard that..." Twilight stops as she saw only Sans, Frisk, and Chara but not the Princess of the Night, "where is Princess Luna?!"
Sans sighs as he looks up at Twilight, "Frisk was telling me some kind of black stuff took her somewhere in the Underground. I'm going to go and look for as well keep my eye sockets on this brat who cause this mess."
Chara rolls his eyes not caring at all to what Sans or anybody (or pony) thinks about him right now.
Twilight nods, "I'll come with you besides Luna is my friend as well and I'll do everything I can to keep all my friends safe."
Sans sighs as he nods his head an agreement for Twilight to come along.
Frisk smiles at Twilight, "they don't call you the Princess of Friendship for nothing."
Twilight looks at Frisk, "you didn't believe I was a Princess?"
Frisk shakes her head, "n... no just confuse to why they title you that way until now."
Twilight smiles understanding the girl's response. The alicorn turns her attention to Chara as she looks sternly at the child.
"You have a lot of explaining once we find Luna and get back to Equestria."
Chara rolls his eyes again saying, "you can't force me back to Equestria besides I'm a ghost so I'll just go through the bars or just teleport myself back here again."
Sans sighs as he kept his look towards the entrance of the cave, "the kid got a point there but let's just get Luna back and hope that nothing bad is happening to her right now."
Twilight nods as she uses her magic to force Chara to come with them, "we'll be back soon and Frisk if anyone asks just tell them that we went back to Equestria to finish what we had come to do."
Frisk asks a bit worry, "but if they do come back they won't be able to find you and know that I lied to them?"
Sans sighs as he spoke to Frisk an irritation, "just don't tell them about what happened to Luna, alright?! Don't want anyone or anypony to go into freackin panic attacks."
Frisk sighs seeing how worry Sans was for Luna as she nods, "alright I'll just try to come up with a lie so nobody knows where you guys are."
"Thank you," said Twilight as she made Chara to fly in mid-air with her magic as she follows Sans into the cave and both teleported themselves into the Underground.
Frisk quickly ran down the mountain as she ran back to her home as well coming up with a lie so she doesn't make anybody or pony panicking about their Princess of the Night being missing and unsure if their Princess is alright.
Once Frisk made it back towards home she stop dead cold. Not that everyone and all the ponies were up since Rimmer and Apple Bloom woke them up but what Frisk see was something she is never going to forget.
There before Frisk was the Princess of the Sun herself and besides the white alicorn is a half-breed animal looking with his horns curves at the end and his long white beard hangs down a little, his eagle-like feet is kinda off the ground with his blue dragon wings helping him to fly.
Frisk gulps as all her plan to lie had suddenly disappeared and known that this Princess Alicorn has to be Luna's older sister Celestia.
"Oh, crap..." thought Frisk as she was no too speechless to even speak.
Celestia turns to face Frisk and sighs, "so you must be that girl I have heard of. Are Frisk Dreemurr the one who free the monsters from the Underground?"
Frisk nods as she kept silent unsure of how to speak to her.
Celestia nods and tries to keep her tears from falling, "then you must know where my little sister, Luna is. Please tell me the truth little one, where is my sister?"
Frisk glance over to see everyone else looking at her with worry and hopeful eyes to hear Luna and the others are alright. Frisk stood as she had no idea or even a clue to how to answer this question especially to the ruler of all Equestria and a Princess of the Sun.
Meanwhile Sans and Twilight look all over the Underground using their teleport magic but everywhere they looked there was no sign of Luna anywhere. It was like Luna had completely disappeared from the world.
As they made it back to Judgement Hall again Sans slam his bony hands onto one of the golden pillars yelling, "I can't believe I lost her! I was supposed to be there to protect her!"
Twilight sighs as she put Chara down, "Sans, it's not your fault. None of us knew this was going to happen."
Twilight was about to put her wing around her friend but Sans looks up and turns to look at her, "your right this isn't my or your or Frisk's fault."
Sans turns towards Chara as he teleports in front of the child and lifting Chara off of the ground holding onto his collar shirt, "this is yours! You led her into this mess as well with Twilight and her other friends!"
Chara try to fight but found it hard to do since Sans was strong and got a good grip of his shirt, "l... look first of all I wasn't behind to whatever the hell had happened to the Princess and secondly Luna and the others led themselves to come here I didn't force them. I made them have a choice and they choose to come for me! I only wanted Luna to come and show her powers that she had to know about! I never imagined this would happen!"