And now for somebody completely different: (Charlotte and Takeru).

"Remind me. Why are you doing this?" Twelve said, as Takeru was once again at the velvet room, this time, with a portable keyboard in tow.
"Because I got tired of waiting." Takeru responded mentally. "And don't say anything either. You're just as bad as I am at that." Takeru added before twelve could snark.
He opened the door, cheerful as ever.
"Hey, Paige! And if you're still here, Alexander too! I got tired of waiting, so I brought my portable keyboard, and... where are you guys?" He said, upon realizing the people in question weren't there. 
Somebody else was.
"Um... excuse me. Who are you?" He asked the person he saw.

"Oh, come on. Where is everybody? What am I without an audience?" He exclaimed.

Once Charlotte noticed the entrance of a new visitor to the Velvet Room she put on her best warm and inviting smile as she had been accustomed to do for so long. She looked at him with a look of caring as she spoke, "Hello and welcome to the Velvet Room." she said calmly as she assessed him for one second. "It is a pleasure to see you Takeru, do you recognize me from school?" she said as she loved having her students come to visit her in the Velvet Room. She smiled as she made a quick clarification, "My name is Charlotte, and you can address me as such." she said wanting to make sure he didn't use incorrect signs of respect. "How may I help you today?" she said as she always did her best to help Persona users.

"Oh? Hello 'mother'. Good to see you!"he said cheerfully. He still used the 'mother' term, as a reminder of their days together. 
He had been one of her better students, being able to transpose a piece while most kids were trying to grasp the c scale.
Fun times.
"I was here to play something for Paige and Alex, as promised... but seeing as they appear to be out at the moment... how about I play something for you?" He asked her.

Charlotte smiled at Takeru's friendliness and cheerfulness, the feelings being infectious to the sweet teacher, "Sure Takeru, take a seat and play what you would like." she said excited to hear how her student was progressing with music. It was always a struggle teaching classes for both the students with music experience like him or those without it. "I can critique your playing too if you want" she said as she giggled a little, "After all, I have been playing longer than most humans have been alive" she in a little bit of a bragging but still caring and maternal tone.

"Alright. Prepare to be amazed!" Takeru said, cracking his knuckles as he set the keyboard up. He thought about what to play for a brief second or too before he finally settled on something.
"By the way... I would have thought you would have been more shocked at her reappearance, no?" Twelve asked him.
"I am, inwardly. But this is more of a happy shock." Takeru replied mentally.
"... if you say so." Twelve said, shrugging.

"Alright. How about... this?" He said. He began to play Vivaldi's Four seasons, in paritcular, the Spring act. Letting his fingers float like falling cherry blossoms, he did not cease his concentration until it was over.
"How was that?" He asked her.

Charlotte observed his form carefully as he played the piano and looked at it a little curious before she sat right next to him, in his personal space and began to move his hand for him a little, adjusting the way that the hand was positioned. "There you go, that should give you a little more note accuracy and allow for easier movements of your fingers." she said as she looked at him for a second as she sat close to him, "Well you don't need to use that technique, but I advise making positions like that feel natural, it will help when you get into playing harder stuff." she said as she did her best to give good advice before she ruffled his head, wondering how his skill level was at the moment, and what would be the best way to teach him.

"Umm... yeah. T-thanks." He said, blushing profusely from how close she was.

"I am playing harder stuff, though." He said, once he took a few mental deep breaths to supress himself.
"Um... would you like to hear something else?" He asked her.

Charlotte smiled a little as she looked at him with a caring look as she stayed pretty close to him, before she went to the keyboard herself to try and play her own version of Vivaldi's song, not following the exact notation of it and instead improvising her own version of it herself. Using her years of experience, she created her own version on the fly and played that, smiling a little before she finished. "You shouldn't think of music as a written medium, instead something that you can manipulate for yourself. The importance of making your own music is expression of what only you can say" she said as she enjoyed helping Takeru already.

"I... suppose." He said, thinking about how she played. It was certainly expressive, something he was lacking, apparently. 
And for the life of him, he couldn't figure out why.
"... try playing something. Something you love. I want to test a theory. And no matter what happens, don't stop. Pour your heart into it." Twelve said.
"... alright...?"Takeru said, putting his fingers on the keyboard, he began to play..

"This is the Twelfth Doctor's theme from Doctor Who. It's one of my favorite pieces to play... and one of the hardest." He added, slowly beginning to channel his will.
All at once, he began to play.
From low keys to high, he did not cease in his movement, concentration unyielding.
For some reason though, he began to enjoy it much more than usual.
Having somebody watch him, a sea of positive emotions in his mind...
He just felt liberated.
And for just a brief moment, as the song ended, a new, clear, sound could be heard.
Vworp... Vworp... vworp... it went.
Takeru was far to wrapped up to notice it, though, and ended the piece right when the noise became faint.
"So... how was that?" He asked her, oblivious as to what had just happened.

Charlotte listened to the way that he made music and the strange noises that he was able to create. Not really concerned with the difficulty of the piece, but rather how well it was expressing his feelings and how much she could hear those in the music. When she was content with what he did she smiled, "There you go. Just remember to practice improvisation from now on okay? Its okay if you want to practice things that other people wrote, but you will eventually reach a ceiling using that method" she said as she wanted nothing more than to watch him improve from here. She didn't really move her seating from there, even if their quick lesson might be over.

"Alright. But it's strange... "Takeru remarked.
"For some reason when I played, I felt that same feeling when I summon my persona. That same feeling that I'm just... breaking free. It wasn't as strong, though..." he explained.
"... so now I wonder... is it possible that, one day, I could summon it this way?" He asked her.

Charlotte looked at him with a look of maturity and wisdom, "Well that day would not come for a long time. But who is to say what is possible and impossible. But it would be impossible for you to summon your Persona without help until you truly know yourself. I will say though that I have never seen anything like it." she said not wanting to tell him no per se, but knowing it would be basically impossible.

"You're right. I... suppose so. I could have sworn I heard the noise that usually sounds when I summon my persona, but maybe that's just me." Takeru said. "But... what did you mean by "help" to summon a persona? You mean there are other ways to do so?" Takeru asked her curiously.

Charlotte thought about it for a second, "It was most likely a coincidence, because that is not possible" she said bluntly as she thought about his question, "I mean your evoker. The thing that you need to summon your persona is what helps you. It is not believed to be possible for someone to summon their persona without something of the sort."

"Huh. Interesting... I guess i'll leave it there for now. Frankly, I could stay here for quite a while more, all things considered... I mean, time doesn't seem to change at all outside when i'm in here." He said. His last little "experiment" with it.
"But i'm out of things to talk about... so... bye. Tell Paige and Alex I said, hi for me, will ya?" Takeru said as he began to pack up the keyboard. He began to head towards the door, when he turned around, having remembered something else.

"Oh yeah. If you want to see me again outside of here, try checking Suzie Q's Concert Hall 9. I tend to be there a lot these days. Bring Paige and Alex if you like. I practically have the whole place to myself since nobody uses that place anymore much. Although.... now that I think about it, do I have your number?" He said.