She's not in the main group of characters, so her artworks are less known. The brown-haired girl is the essential main character.
And good, or else I'll have to punish you >:O [/justttt kidding] If you need anything, feel free to drop off a VM :-]
She's Tsuruya from Haruhi Suzumiya no Yuutsu (The Melancholy of Haruhi Suzumiya). It's a really weird, but thought-provoking anime. You seem new, so welcome to the community :D Unless you are one of those evil alternate accounts