Some  problems with Jessi straight out of the box: 
-her hands and feet are big, too big for my taste,
-her upper arms are too short, while her forearms are too long,
-the "eggly" forehead.

I've made a custom pose that scales back her hands and feet to 90% and does a little tapering on her forearms and shins. Only a little.
I've made another custom pose that increases the xScale of the upper arms to 110% and decreases the xScale of the forearms to 90%.
And the forehead can easily be fixed using magnets.

After these little adaptations she's good to go. Shoes remain a problem, especially high-heeled ones (but for high heeled Jessi stuff I always pick Glamorous Jessi). But in barefooted fantasy renders she looks more than nice.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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