Allison

Allison is a minor antagonist in Fraternal Twins. She appeared in the episode Totally Grounded alongside her best friend, Siena.

She is “portrayed” by Lauren Lindsey Donzis.

Personality
Allison, like Siena, is very sassy and judgy. She also despises Katie and calls her “a waste if time” and “a nobody.” She used to idolize Lindsay because she was pretty and looked popular, but when she found out that Lindsay would always stand up for her little sis, she hated them both.

Totally Grounded
In this episode, Allison and Siena do not want to hang out with Katie, but when she points out Lindsay they decide to use her to get close to her older sister because they think she’s cool. They seem to fan-girl over her until they realize she really cares for her little sister.

Siena
Siena is Allison’s best friend, they like a lot of the same things, and they are both the mean girls of their school. Allison is only seen once, so that’s the only time she and Siena are seen together, and they seem to like being the mean girls together. They have a lot of things in common with each other,

Trivia

 * She is the same age and in the same grade as Siena (who is a year older than Katie).
 * She formerly idolized Lindsay for being pretty and cool.