I’m talking about deaths among main characters, not supporting characters or background ones. For example, now in Tsugumomo, it doesn’t matter who dies, I won’t feel anxious, because I know the characters will be resurrected somehow. In fact, I wasn’t even afraid that Ouhi would die. I even mentioned this in a comment I made on earlier chapters. I was certain the author would find a way to bring Ouhi back to life.Some of these students (specifically that male one towards the end) seem dead for good so there is permadeath, just not of the waifu tsukumogami variety.
And it doesn’t have to be a bloodbath like Shingeki no Kyojin. Just killing a single main character is enough to make you really anxious about the upcoming fights.