This was a good volume, though it was at times hard to read. We are used to Mob being super powerful, so once things got to a certain point, we knew he could always protect himself. He chooses not to fight, to not use his powers against others, but that doesn't mean he can't. And in the past, he has fought (after losing consciousness at one point, but still).
This time around, things got really bad before he could protect himself. It was really hard for me to read what he went through, I had to take a break in between. But Mob has people/beings that genuinely care for him, and as powerful as he is, this manga really does emphasize the importance of connections. Mob's strength doesn't come just from his insane power, but from the connections he has with those he cares about.
There's also the fact that Mob has an innocence and kindness to him. A general goodness so innate that after his ordeal, he said he learned that he needs to be more grateful for the kind people in his life. He's honestly just so good. Which made what he went through even harder to watch. I wonder if what he went through will leave longer lasting effects than even he realizes. I've already requested the next volume.