There wasn't much for Zach to prepare other than freshen up a little and get dressed, which he could do even without Nora since he still had Yanael. But he was a little worried when she didn't show up as she had promised.
It wasn't like she would have had an accident or gotten snatched since it was the Evandiel Manor, and she was Nora. The worst thing that could have happened to her was her mother. But that wasn't necessarily a good thing.
If Nora hadn't returned because her mother had stopped her, it probably was not because she had to praise Nora so much that she wasn't allowed to attend the person she served.
'I will see you in the next life, Nora.'
Zach dedicated a prayer in his heart to Nora before leaving his room ahead of time. He was pretty confident he would find the dining room. If it came to it, he could ask one of the servants. But he absolutely didn't want to be late.