For the most part I knew what I wanted Eris to look like since the beginning, but there were several different drafts of the story, one of which started off with Eris on a hospital satellite ship, she's wearing a kind of futuristic hospital gown in this first image.
I did a bunch of other sketches figuring out her overall look as well.
When I got the final draft of the story done, I was able to focus more on the outfit design and think about how future humans might dress, and how Eris in particular might dress. I went through a bunch of different ideas, here they are below.
Eventually I settled on a kind of bodysuit with a coat over it, and did a few variations on it.
The final lineup for the design is below
I wanted her final outfit to give her flexibility and also have the ability to function as a space suit or be worn under a larger space suit. The jacket also gave her the ability to conceal a weapon as well which would be useful in the action scenes.
Eris is an optimist, an idealist, and is a very kind person, however she's also a professional and can be serious minded when it's needed. She's also a natural leader and good at making new friends. She serves as the 2nd in command on the interstellar space ship she's been assigned to.