Flaw

Miel watched in silence as beads of sweat began to fall down Yuri's brow. This matter shouldn't have taken so long but after the curse was mostly lifted, Aina's mental strength had take an impossibly massive leap forward to the point her previous and current power in this aspect could be compared to night and day. 

Due to this increase in strength, what Miel had prepared became impossible to use. 

Of course, Miel was surprised by the fact his daughter had found a method of dealing with this curse on her own when even he had no way to do so. But, it seemed that even Yuri had no idea how this came about and whenever he asked Aina about it he would receive silence in return. 

The relationship between them as father and daughter couldn't be described so simply. They ate in silence with the exception of their clashing elbows. They hardly spoke to one another. And, they would often meet the other with silence even if a question was asked.