"If you are L, then you are someone I admire a lot." Light began.
"If you are L. Well, I just happen to know a way to determine exactly that."
Light turned around shocked. The girl had been listening? How much had she heard? It didn't matter either way - she clearly had no solid evidence, no matter what she said. It was all too easy to pass the conversation off as a joke. Besides, this gave Light a good opportunity to change the mood, and escape Ryuuga's persistent stare.
"L? Oh no he was only joking. You needn't worry." Light laughed. "The three of us are clearly intelligent, but we're far from L."
"You have a way to find out if I am L?" Said Ryuuga, completely disregarding Light's statement, and turning his deep, black, velvety eyes towards the girl. Well, at least he's staring at someone else now.
The girl looked down for a moment and smiled. Light wondered what "evidence" she could possibly have had in mind. Then she looked back up and made direct eye contact with Ryuuga.
"I am X."
Light struggled to stifle laughter. X? Nice try. He had never heard of an "X". And it wasn't as if light wasn't up to date with the world's leading detectives. To his surprise, Ryuuga's eyes widened.
"You're... X?"
"Code number 330712?"
"Code number 866902."
"Wow." They exclaimed in unison.
"It's really you."
Light had by this point decided for certain that it was all a hoax. He had been very sceptical of the prospect of Ryuuga being L to start with, and with the addition of this girl claiming to be significant too? The idea was preposterous. Still, they were definitely watching for a reaction, so the best he could do was entertain their fantasy.
"X" he said. "Forgive me, I don't recognise the name - are the two of you acquainted?"
"I have worked closely with X on nearly 97% of my cases" Ryuuga exclaimed, keeping his eyes on Lux. "Without her, around 33% of them might still remain unsolved, and I would certainly have taken much longer in completing the others." Light nodded slowly. "I take it Lux keeps a lower profile than you, Ryuuga?"
"Strategically, it makes more sense not to let on that two famous detectives work together regularly. It makes it harder to track us down."
"Not that we've ever met."
For the first time since confronting Ryuuga, Lux turned her gaze towards Light.
"In truth I probably knew no more about L than you did before today."
Tension seeped across the room. It was clear that something in Ryuuga, or "L"'s methods really frustrated Lux. If Ryuuga wasn't L, this seemed an intricate scene to be staging. Light wasn't even sure what reaction they wanted from him anymore - if they wanted a reaction at all. Regardless, for the time being, he needed to focus on acting as the perfect student, morally flawless, Light Yagami. Perhaps another time he would be able to talk to Lux independently. If he could win her trust, perhaps he would be able to turn her against Ryuuga, and find out exactly what these two students were attempting to do.
After the speeches ended, the three students stood next to each other on the front steps of the university. A moment's silence passed, and Ryuuga turned his head over his hunched shoulder to face Lux and Light.
"Hey" he said. "Thank you for today."