Board Thread:Questions and Answers/@comment-28004725-20160318222151/@comment-24888364-20160409105257

Judging by her character design and Delinquent actions I can guess that the "robe" she's wearing belonged to either the original delinquent leader or someone who challenged her authority and she rendered him comatose for challenging her or so that she can take over the delinquents hence why she is wearing the robe and has numerous bandages on her arms and leg or possibly hand wrap

Before she was suspended she took over the delinquents and they adopted her style and became the way they are now.