First of all, welcome to the Moriya Shrine, tea is on your left and coffee is on your right.
As a fellow lurker, at least most of the time, I understand your problems with posting. I do not want to convey more information about myself than is strictly necessary and even one step out of bounds would require rewriting an entire paragraph to avoid that problem. Yet I believe there are two (correct) solutions to this dilemma: work fast as if you have just drank a can of coffee or work meticulously slow like you're drinking tea. I tend to choose the latter option, as I find about the same amount comfort in each of the small steps of writing as the big finale of the process.
Something tells me we're going to enjoy each other's company, as our interests mostly align. It is just that I use a lot more comparisons and idioms in my sometimes imposing walls of text that likens more to spinning the water in the tea than drinking it. It's basically does nothing to the flavour but makes it tastier to some people. Even when people drown in the sea of idioms and comparisons I prepare, they usually arrive at the destination I want them to arrive to... Or at least I think that is the case and they did not just guess correctly all those times.
Don't worry about how you write, as it is a type of accent that would be a shame to see disappear into the eternal void of getting demonized out of existence itself. Even if it does not read as fluently as "when it rains and the sun shines there is a fair going on in Hell" (Dutch idiom translated into English for your convenience) it still has a charm in and of itself.
My own read on Yuuka, the limited knowledge that I own of her, is about the same as yours: someone caring for something so much she has essentially shunned any other interest of hers to protect that one thing she holds sacred above all else. A truly kind person who uses an aura of death around her to protect those she wants to associate with. At least, that interpretation is one I find most correct from having played through the story mode of the Prismriver in PoFV.
So please, enjoy yourself, relax, drink some tea and watch the cherry blossoms bloom in a week or two.