Over the time they spent together, Nox learnt many things about them.
First, Rovenin was voluntarily serving Carseain as a master and that Carseain himself was neither too thrilled nor too comfortable with it.
The second was that Carseain is a monster. The rumours about him being strong did not do him justice.
Nox just accidentally saw him swinging his sword once in the middle of the night. On a lonely ground, he stood alone under the moonlight profusely sweating.
The single strike he saw cut through the air.
Everything about that single scene was lethally dangerous yet stunningly beautiful.
Lastly, he got to know that The Young Master was not essentially a bad person, it was just he had a very quick temper. The string of his calmness was too thin, probably thinner than the threads used in embroidery, it snapped just as easily.