this conclusion based solely on this picture

Pictured is our mystery individual from the very end of the Danganronpa V3 trailer. Unfortunately, it is impossible to ascertain who she might be from this snapshot alone. She appears to be a student of Hope’s Peak academy based on the characteristic brown blazer.

While I do not want to jump to wild conclusions based on a single fuzzy image, if I had to speculate on her identity then I would wager that she is Nanami Chiaki, based solely on the fact that she is the only previous character that wore clothing with oversized sleeves. Of course, this would be a rather hard pill to swallow given her status as an intangible AI and subsequent “death” in Super Danganronpa 2.