Elsa could be a reference to the character from 2013 Disney film Frozen, because they share the same name and due to her braid hairstyle.
Her family bio also shows that her older sister is apparently jealous of her because her trait is Genius, which makes her surprisingly smart at her young life stage. She is also a part of the League of Adventurers club as a child. She is also a Grade B Student
Elsa also made an appearance in a render of Get Together along with Alexander Goth and two unknown kids.