This picture was made by Loxx.
Cassie is a girl with a black and blue shirt, complete with black shorts. Her eyes are blue similar to the Omnidewtrix. She has a birthmark on her left cheek, but she is often called 'Case' since it is misheard by reckless bullies and villains.
Whenever this happens, she is really ticked but kept back by her friend Anna.
Cassie is a girl who bluffs, name-calls aliens, is adventurous, and bold in her ways. Nuff' said.
How She Gained the Omnidewtrix
One day during summer vacation, while exploring a deep valley with her friend Anna at the Festival Groyd Park, Cassie finds a watch and inadvertently reaches her left hand out to the object. This is when she gets the Omnidewtrix with a handful of aliens, like 12. With the watch comes an encounter of action.
Cassie 12: Omniverse
Cassie is likewise still who she is before all the events after Cassie 12 Meets Ben 10 had not occurred. However, she has a different set of twelve aliens...new enemies...new adventures. She is shown to have developed another catchphrase such as "Sweeet beams!"
It's revealed she doesn't know if she has Scottish relatives in her family tree in Store 22 as her other self displayed it in her speaking. Cassie also has made a new enemy primary an astrodactyle by the name Santanio before the series conclusively started. However, she still has her friend Anna and Uncle Stallion who now has a Sami truck and Trucky.
In Outta control Ghost Crab!, Uncle Stallion reveals Cassie snores when she is sleeping.
This is a Part of the Cassie 12 Franchise