kirisame marisa ?
This is Oshino Shinobu
even tags on pixiv says so.

I was just coming to post it myself. No idea how you mistake Shinobu, whom kouji draws lots of, for Marisa. Aside from the twin braids.

The braids are most likely what caused the confusion. I even thought it was at least Shinobu cosplaying as Marisa from the thumbnail.