Lynx guessed Red would've gone home after confirming with Grillby. She heard him say he wasn't coming back to Underfell. 

"Human what are you doing?" he asked her. She sighed softly and pulled out an item from her pocket.

"Things change overtime. Like flowers, seasons, even people." 

"I agree with you."

He looked at the winter star.

"Sometimes I wonder if I truly can change. I hoped to fix what I've broken but seeing the damage there's no way I could ever." 

Lynx put something in his hand.

"Huh?"

It was a locket.

"Here. I crafted one for you and one for Sans. That way you'll never feel alone anymore."

"Human, teach me how to craft it."

Lynx smiled and got out the extra supplies.

"Let's get started."

It was a long, tedious process, but Edge was able to make a nice locket equipped with music.

"Heh." Lynx was proud.

He inserted a little photo of him and Red into the locket.

"I want to give this to him one day, and tell him I'm sorry." 

Lynx checked the music and shook her head.

"No. This isn't good. You should give him something better."

"Like?"

Lynx played a recording.

Edge went a deep red. "H-how did you record me singing??" he was singing this at night, when he felt alone and wanted to release his inner voice.

"I have my ways."

She changed the music. "I prefer this."

Edge turned around and saw his brother standing there, waving to him.

"Brother... BROTHER!!" he ran after him.

"W-" Lynx turned to see him.

"Brother I'm so sorry please forg-" but as he went to hug him, Sans disappeared.

"Wh..." he looked around him.

No Sans.

"..." he felt like crying.

Lynx walked up behind him.

"You saw him." 

"I-I did but-"

"...Illusions. I had them when I first came to Underswap." she looked at the wall sadly.

"Maybe we should go back there."