My guess is this was something Junna has been very conscious of from early on. It might even be the motivation behind cutting her hair, to distinguish herself from that older magical girl, whatever the connection is. That also might be why she hasn’t fully opened her heart to Hane, not that I think she has anything to worry about. Hane met that magical girl once, and while the resemblance might be why she was drawn to Junna at first, it is Junna she spent the past year falling for.