Eulalia insisted on going to the castle with Hewitt.
Indeed, Hewitt had no need to stop her.
If she went on her own, it would be more likely for something to go wrong, and he couldn't just knock out a noble lady and lock her up here without any reason.
On the contrary, being by Hewitt's side was one of the safest places to be; even if it were mental contamination, he could help Eulalia cut it off. Besides, he was more inclined to take her with him.
Because her visit today was more of a secret mission, it was unlikely that anyone could know about it. If someone were trying to set him up, the more unpredictable variables there were, the easier it would be to disrupt the other party's plans.
It was not until he realized that Eulalia was walking so slowly that he regretted it.
The castle was located outside the city limits of Aaron's city, and they had to pass through a muddy path to avoid any possible surveillance on the roads.