These character designs vary quite a bit from normal. So much so I'd suspect them of being different people if it weren't tagged with Toradora on Pixiv.

Even without the tags, I think I'd have recognized Taiga. She may be a bit too tall, but there's something unmistakable about her eyes, hair, and expression. After that, the others would be easy to place. The only person about whom I'm not certain is the girl in the top-middle; she reminds me more of Kanou than Ami, but Kitamura's colorswap (which is very cool, IMO) seems to favor Ami. My hat's off to you, artist, cuz this pic is DAMN good. If I had the money to fund it, then I almost certainly would.