For this week, I have a fairly good idea as to where this character is from, thanks to her uniform.
She’s definitely a character from I’s, but I don’t know the series well enough to tell who she is.
Help me out?
Thanks very much to Linkthe1st for suggesting this character is actually Isozaki Izumi from before she had cut her hair in the series! I think it’s highly probable, unless this girl just felt like cosplaying and decided to wear I’s school uniform.