I vectored it (in fact, i wanted to vector matsuri completely... but considering i never tried to do a vector first, i just did that tiny part
)
as for the size, I noticed also... i was gambling : well... does the extra space will give some "scenery" impression? conclusion : now way x_X
Well, the colors were a bit contradictory first, but when i considered some added filter and brightness, the result was matching the official arts i found (in fact, there is only 1 art where matsuri is slightly different, and this is the church one, where you see her with bright black hair)
meh, i tried to tone the "night purple" down, here is what i have changed so far :
the first one is the a tiny correction for her hair : between purp and black, without darkening it like an idiot XD
the second is a noobish attempt to give some "under the sun" impression.
i also slightly corrected the color of her skin (it was a bit too bright)