User blog comment:DE-Note/New Character?/@comment-25396609-20151024033319

She is looking at someone on the ground, standing over them, and has a "you're hopeless without me" look on her face. She has never appeared or been hinted at before, and her design is distinctive. Not to mention she is the ONLY newly shown character to get a full focused shot to themself.

Literally everything about her screams SUPER FUCKING IMPORTANT

Meaning she's important, or one of the biggest red herrings of all time.