Need help deciding an aspect of the twine game. (Patreon)

So, I'm having trouble deciding what the starting outfit/personality for Seri should be. 

Should she be in her full uniform with her hair up and act totally cold and serious 100% of the time, 

or should she be in a more casual outfit and not be as cold but still a bit serious at times. 

Or, should it be the casual dress with the serious personality? 

The part that makes this hard is that her casual dress is less sexual and I want to have her uniform as one of her outfits when she's finally in bed with you (plan to have a lot of different outfits for her), complete with a strip tease with that as well. 

But the uniform has her hair up so I could do it so as she's changed by the remote the hair starts to come un-done. 

I have a few pics of the different outfits. 

Casual 

uniform

I did a similar poll on deviantart and the cenceus was do the uniform. But again, It's a bit sexualized already. 

Maybe I could do it so that the skirts longer. Definitely will have her shirt buttoned up more so her cleavage is slowly shown.