Emily/History

Pre-SHAETALE
Emily lived at home with her father, along with her younger sister, Belle, until she helped her escape from home when they were children, sparing her from their father's abuse. At some point, she got a crush on Wyatt, and would spend some time pursuing him that quickly became obvious that it was in vain.

Debut
Emily runs into Wyatt and Shae, and was seen often insulting and harassing Shae as the latter was dating Wyatt. She dug up dirt on the skelefam, Chara, and MTT, and began insulting their deepest insecurities, sending most of them running away in tears.

Redemption Arc
Sometime before the skelefam went to the beach the first time, Shae texted Emily after getting her number from Wyatt, with the intent to try and talk things out. Surprisingly, this actually doesn't prove fruitless, as Shae is able to quickly convince Emily to at least talk to her. Shae finds out that Emily has an abusive father that she lives with, now having something in common with her. Emily then begins being nicer to her.

When the skelefam goes to the beach, Papyrus finds out about Shae and Emily talking, and is quick to offer to help Shae and Emily, having already forgave Emily quite some time ago. The rest of the skelefam is not so quick to forgive her, even forbidding Papyrus to visit her. However, sometime later, Emily gives a genuine apology, showing her remorse to them, which prompts them to at least give her a chance, though they may need some time to actually forgive her.