I found something interesting

We know Toga is around the same age as class 1A and is on the run for taking blood from victims.

Assuming that she is a first year and that she probably hadn’t started at her high school before running away, I’m going to say that her current outfit is her middle school outfit that we see her in

Compare that to Uraraka’s middle school uniform:

It looks almost exactly the same, and the jacket is placed where we can’t tell if it’s a cardigan or not. I almost wrote it off completely because of the dot in the middle of Uraraka’s uniform until:

I noticed it was a pin that Uraraka placed on her uniform, making their uniforms basically identical.

So that raises the question, do Uraraka and Toga know each other from middle school? I’m not sure on Uraraka’s end, but it is possible the Toga knows who she is based off their interaction.

With how the middle school relationships have been revealed in the manga so far, I wouldn’t be surprised if they knew of each other.

Does this make Uraraka the traitor? I’m not sure (I HOPE SO). If she is pretending not to know who Toga is and is secretly helping the villains that would be quite the plot twist.