I personally don't think they look the same at all. They have a similar build and that's about it. Considering the main plot for the filler arc has already been talked about to some point and a Rukia doppelganger wasn't ever mentioned I would just bet it's a random side character that people are reading to much into.
and their hairstyle is the same too. but now i also think the green haired girl is like that other dudes sister like rukia is byakuya's sister. you know what i mean? and they'll clash thats why the trailer said byakuya vs byakuya
ok ok wow, i looked at the pic this time, dudes wtf thats not a rukia look alike, lmao just cuz she has short hair, freakin morons haaha. there are look alikes in the show like Shuhei Hisagi is just an angry ichigo with black hair.
sorta like goten, goku, turles and bardok in dbz, not the same person but all are copy pasted
No need to resort to insults, It's still a matter of opinion in the end, If he/she thinks the character looks like Rukia so be it, we've just been voicing out our opinions, there no need to impose yours on everyone.
I don't think she looks like Rukia albeit very close though.