Is it not Snape?

"What?!" Hermione asked loudly. "That- That makes no sense! He's a professor that's been teaching here for more than we've been alive,"

"And a lot of people who we thought would be on the good side joined You-Know-Who," Ron said. "We haven't witnessed the horrors of those times with our own eyes, but our families did and many others. Many people became Death Eaters purely out of fear. Even the people my parents thought would stay with us for the fight went over to the dark side. Not only does Snape act suspiciously, he also was a Death Eater in the past,"

"Yes, he was a traitor in the past and it wouldn't be surprising if he betrayed Dumbledore now," Harry said.

"Well we can't just start assuming things now," Kristine said. "From our perspective, Snape isn't even that bad. Do you have any proof of him trying to get the stone?"

"Well it was before the Hufflepuff Quidditch match. He was injured by one of the things guarding the stone," Harry said. "Why in the world would he even be where the stone is being guarded if he didn't want the stone? Furthermore, we also heard him threaten Quirrell, one of the professor who helped defend the stone. He's been getting harassed by Snape for a long time now and he finally cracked,"

Hermione and Kristine were now silent.

"Either way, regardless of whether or not Snape is helping You-Know-Who or not, it's imperative that we don't allow the stone to get to his hands," Ron said. "If he does get the stone then we'll be screwed!"

"How about we try to broaden our suspect list," Chris said. "While we do believe you about the stone because there's no point lying to us, but you can't just have Snape as your only suspect just because you hate him. I think that if Snape was going to betray Dumbledore, he would've done it a long time ago. After all, 11 years is a long time. Even if the Dark Lord has been extremely weakened, he probably still has his ways of finding his loyal subordinates. You have to have other suspects as well,"

"But Snape really is the most suspicious one Chris," Ron said. "Yes, Harry and I hate Snape, but we won't accuse him of a crime he didn't do especially if it's something this serious. This is us just putting the evidences we found together,"

"So Harry what was your punishment anyways for breaking the rule?" Chris suddenly asked.

"We-We went to the Forbidden Forest," Harry said. "Unicorns were being attacked and we had to figure who was doing it,"

"So did you find anything?" Chris asked.

"Yeah, it was really scary. I don't really remember much, but this man was drinking unicorn blood. He was about to attack me, but I don't really remember much after that since I had a huge headache in the middle of it," Harry said.

"Has anyone told you what drinking unicorn does?" Chris asked.

"Yes, unicorn blood does give you life, but the price is that you'll be cursed and essentially be very weak," Harry said.

"I'm guessing that whoever it was that you met was the one that is assisting the Dark Lord. Snape doesn't look weak to me," Chris said. "On the contrary, I think he looks extremely healthy,"

Ron and Harry started to think about what Chris said.

"You're... right," Harry said weakly. "If it's one thing that Voldemort needs, it's an extension on life and unicorn blood can temporarily give it,"

"Then if Snape isn't the person helping out You-Know-Who... then who is it?" Ron asked.

"It could anyone from the students to the teachers. If it's a student then it can be anyone," Chris said. "However, in my opinion, if it's a staff member, it has to be Quirrell. He looks abnormally pale everyday as if he's very sick,"

"No, it can't be Quirrell. He's the one trying his best to not reveal anything," Harry said.

"Yeah, he never cracked and I think he's the one trying his best to keep You-Know-Who away from the stone," Ron said.

"Like I said, if it is a professor, then Quirrell is the most suspicious," Chris said. "He looks like someone who drank unicorn blood considering how haggard he looks,"

"Alright let's stop talking about this," Kristine said. "The star of the show is not the Stone, but Harry and Se-yeon. Look at Se-yeon she looks so tired right now. Let's get her to her dorm,"

"You're right," Ron said. "Alright then we'll be leaving. If we get any news, we'll be telling you,"

"Yeah," Hermione said. "We'll help you in any way that we can,"

Harry, Ron, and Se-yeon left the Dining Hall leaving Chris, Hermione, and Kristine.

"Isn't the Philosopher's Stone it?" Hermione asked.

"For the riddle?" Kristine asked.

"Yes, it can make someone immortal. It's the perfect answer for the riddle," Hermione said.

"I suppose it is," Chris said.

"Well what are we waiting for. We'll try getting it now. We'll ask Harry and Ron where it is and we'll try getting it ourselves before You-Know-Who snatches it. We're hitting two birds with one stone," Kristine said.

"No we'll wait," Chris said. "We'll wait till the Dark Lord helper comes and then we'll remove him from the school. It's better to get rid of the liabilities before they become a real problem,"

"I suppose you're right," Kristine said. "Alright we'll wait for the helper to try to get it before we try to get the stone,"

...