Harold is busy making the hero party members consider him a benevolent existence. That makes sense, since he doesn't want to get killed by Liner & Co, either directly or indirectly. But likely rather than be friendly with them, he just wants them to get stronger as soon as possible. His very first action in that world was already something that hurt the hero party's prospects by removing a powerful motivational factor, so he ought to be doing it both out of necessity and out of responsibility.
I wonder if Erica is already working with Liner and Colette. Harold would really need to go out of his way to arrange for them to work together, if it didn't happen naturally. Especially if they originally met when the hero party was fixing the miasma issue. Though I don't know if that was the case. Now there's also Leafa. How did she join Liner's party originally, and will she do it in a world changed by Harold?