Well some do say 'All's fair in love and war' but yes, I completely disagree with the way she's approaching her new found love for Yoh. Pft, the sad thing is that Yoh will probably not yell at her for ruining his relationship with Haruna. I can just see it happening, Yoh will find out about what eyebrow girl did, eyebrow girl will just say 'Oh but I love you!!' and then big fat pitiful tears will start sprouting out of her squinty eyes and then Yoh will feel pity for her. Again, pftttttt. Yoh and Haruna's relationship will not end that simply. I refuse to believe that.