Izzy is one of the 9 main characters in the show. She is a voice of reason and one of the more intelligent characters.

Isabelle is a professional -well, at least she tries to be. She has found herself in what is probably the least professional unit she could have ever imagined. She wants everything to work as intended and won't hesitate to raise hell when it isn't. She's by the book -unless the book was written by morons. She takes herself a bit too seriously at times and gets bent out of shape when the rest of the team doesn't share her enthusiasm for military honors and procedures. She is easily overwhelmed and a bit neurotic. She fancies herself a brilliant technician whose talents are wasted here, yet she has a very strong bond and connection with the team she doesn't quite have the emotional intelligence to communicate properly. She has a cast iron moral compass and doesn't suffer fools. 

A good character to emulate for this part would be Piper from Fallout 4.