Here is a sketch page of Vikki's different facial expression.

The first is she lacks sugar. Sugar is her drug. It is necessary for her concentration in these experiences and other business.

The second is Vikki angry because we dare to say that science is useless. She will make you see all the colors!

The third is super happy. So glad she has stars on her eyes. Either she sees something that pleases her (like cupcakes), something that fascinates her or that she had a great idea.

The fourth represents her who has waited for something or seen something and it interacts with it.

The fifth and last represents Vikki sad because she discovered that the famous cupcakes that Roza (character of xiardoruzo) was in out of stock.

Art : https://www.furaffinity.net/user/zirajam