Ready to answer your questions (no spoilers). 1) As you already noticed, Sawatari paid with one fingernail for using the snake demon. That is, this means that the price can be anything, no matter how strong the demon is. By the way, if you haven't noticed, Sawatari used the snake demon in two different ways, namely the "Absorb" command and the "Tail" command, which is quite unusual because demons usually only allow themselves to be used in one way. And she just pays the same price for 1 nail, apparently the snake demon really liked her, since he allowed himself to be used in two different ways and still pays the same price. By the way, she can use it in a third way, but this will be shown in the next episodes. 2) The katana man's "dash" ability is a very precise ability because before using it, he must take a stance and clearly determine which part of the body he will strike, and then pass through his opponent at extremely high speed, precisely cutting certain parts of him bodies. And this ability is also associated with the concept of the katana, namely with representatives of people that when a samurai takes out a katana from its sheath, he can very accurately strike his opponent in the blink of an eye. 3) 5:26 You misunderstood, here katana man meant killed people who were associated with Denji, that's all. 4) How Makima survived the head shot and remained unharmed, well, there is an answer to this, only it will be given only in season 3 :). And yes, birds are very closely associated with Makima, so look out for birds when they appear. 5) Regarding your question, why Kobeni with her abilities did not fight the demon of eternity. Well, high speed and agility with quick reaction will not really help against the demon of infinity in tight spaces, and which can endlessly regenerate itself and also attack simultaneously from any side. By the way, perhaps her high speed and agility with quick reaction is somehow connected with her contract. 6) Please check the comments under the previous reaction to episode 8 of Chainsaw Man because there is my comment explaining moments from episode 8, I recommend reading it :).

Thanks!

Did you read my previous comment under your reaction to episode 8 of Chainsaw Man? ​@@MrAnimeAlex1