Lullaby
Wayvern was in Cloudsdale, escorted by Rainbow Dash. He was on official business involving the Council, according to Vulcan. He had to perform census for everypony who got hurt in the Kaiju attack. No casualties were to report. Then Wayvern heard singing.
"Toue Lei Zue Kuroa Ryuo Toue Zue
Kuroa Ryuo Zue Toue Ryuo Lei Neu Ryuo Zue
Va Lei Zue Toue Neu Toue Ryuo Toue Kuroa
Ryuo Lei Kuroa Ryuo Zue Lei Va Zue Lei
Va Neu Va Lei Va Neu Va Zue Lei
Kuroa Ryuo Kuroa Neu Toue Lei Kuroa Ryuo Zue Lei Va
Lei Va Neu Kuroa Toue Lei Lei."
(Sung "Tway Lay Zway Kro Ryo Tway Zway
Kro Ryo Zway Tway Lay N'way Ryo Zway
Vah Lay Zway Tway N'way Tway Ryo Tway Kro
Ryo Lay Kro Ryo Zway Lay Vah Zway Lay
Vah N'way Va Lay Vah N'way Vah Zway Lay
Kro Ryo Kro N'way Tway Lay Kro Ryo Zway Lay Vah
Lay Vah N'way Kro Tway Lay Lay."
It'll take a real Tales Series nerd to recognize this song. If you don't recognize it look up "Grand Fonic Hymn.")
Wayvern recognized the song. It wasn't from his own memories, but from the early memories of a filly named… what was it? His memories were too shocked to get it at the moment. He went to the source to find Rainbow Dash was the one singing the song.
"Dash," Wayvern said. "That song…"
Dash looked shocked. But she went right back to her memorabilia. "It was a lullaby I made for my little sister, my parents passed when I was old enough to have a job, but I couldn't afford to put a roof over her head and food on the table for her just yet. So I put her in an orphanage."
"I remember it." The words seemed to confuse Rainbow. "I mean I think I came in contact with your sister recently. Do you remember her name?"
"She was very little; I doubt I'd recognize her now. She didn't have a name back then."
"Can you teach me the song, so that I can identify your sister next time I see her?"
Dash taught Wayvern the song, though he wasn't quite as good at singing it as she was. Over the next week Wayvern was singing the lullaby every time he was in Ponyville, because he remembered the memory starting there. On the seventh day of his visits to Ponyville, he was approached by a young mare. She had short magenta mane and an orange body. She was a Pegasus, making Wayvern think he found Dash's sister.
"Your Majesty!?" she exclaimed when Wayvern looked at her.
"And who are you?" he said as gently as he could.
"I'm Scootaloo, one of the injured in the last Kaiju attack. You healed me, remember?" Wayvern realized that he was right. He got the memory in Ponyville.
"I'm sorry but I healed a lot of ponies that day, I don't recognize a single one from the rest… until now that is."
"Oh…" Scootaloo seemed to lose some excitement. "That song… I remember it."
"I know, I'm singing it from your memory." Wayvern went to explain his special ability to Scootaloo. If it's a living creature and he comes in contact with it, he can remember the experiences of that Creature, even if they die moments later. "And I learned recently that it was the memory holder's sister who sang it to her as a lullaby." Scootaloo donned a face of disappointment.
"So, it can't lead me to my parents…" she said with disappointment.
"I found the one who sang it, though."