While Hakki was hiding somewhere in a place where Aru could not be seen by his naked eyes, he was hyperventilating, he was now imagining how Aru would feel as she read those, he thought that she would be fuming and raging with anger as she read each letter of his, but of course, these were only in his thoughts as he himself did not know how she would react as a whole to this kind of information.
As Aru read on each letter and each word that was written by Hakki, tears started to fall from her face, both from anger and from helplessness. First, she was mad at Hakki, the Fifth Spirit of Hunting, and also at Jorm who was basically the hot headed asshole who was technically responsible for this whole thing unravelling the way that it did. But still, her anger towards Jorm far outweighed her feelings of rage towards Hakki, as he himself was the one who managed to finish him off all for the sake of her and the memory of her mother.