The first one she attacked was Fromund. However, it quickly became clear to everyone that he wasn't her target, but Adam.
Whether Fromund wanted it or not, Bathild didn't see him as a worthy opponent. Even if he was as strong a Phantom as Adam, it didn't matter.
Strangely enough, reputation and recognition played a big role in this case.
None of the monsters knew a Phantom like Fromund Aegler. Well, even if a few monsters were aware of Fromund, it was clearly not enough to pique Bathild's interest.
She decided to fight Adam because it was her way of getting the Title.
All Fromund could do was stand aside and watch Bathild attack Adam with all her might.
She crashed into Adam, shaking the entire Kirani Colony with lightning bolts. Her strike threw Adam aside with such force that the impact sent him dozens of meters underground.