Now that I think about it, it was a bit suspicous of how she was so confident Glan and Veronica weren't lovers. And from the beginning I thought it was suspicous when she intoduces herself as Bart but the flasback of Veronica in that scene in from Glen's field of view. I will say kudos to the author though for all this foreshadowing. Not only with her but with Zeze too.
If she was Glen, I think she asked Minami if Veronica and Glen weren't lovers to test him to see exactly how much he remembered from his past life. Maybe they indeed became lovers at the end, but Minami forgot about that. (He doesn't quite remember everything.)
A FANDOM User
I don't think that they ever became lovers because at the last battle, Glan told Rida that he wanted to tell the Princess that he was in love with her and then they all died to put it bluntly. So Veronica didn't even know he liked her and anyway do you remember how the manga said that she never even really thought about love and stuff and teenagers didin't have anyone to tell them what love is so even if they had a little thing going on, they couldn't even recognize it as a bf/gf realtionship themselves.