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Kyoya Hibari -The 10th Vongola Cloud Guardian

"The word ' discipline ' is something that I would never give up, no matter what. But it is not because it is my pride that I will not give up. It is because I cannot give it up, that`s why it is my pride."

Bio:

Kyoya Hibari commonly referred to as Hibari, is one of the major characters in the Katekyo Hitman Reborn! series. He is the leader of the Namimori Middle Disciplinary Committee, a group of delinquents who are all loyal to him. He was nominated and accepted as the tenth generation Cloud Guardian of the Vongola Famiglia. He is often seen napping on the rooftop of Namimori Middle School, alongside Hibird. 

(Extract from the Reborn! Wiki)

Before we get started:

Due to the general lack of feats in Hitman Reborn, I'm going to say now that this post is going to involve a lot of scaling. I'm going to try to tone it down as much as I can but I only have so much to work with. That said, let's get into this.

The Solitary Cloud I - Physicals:

Hibari has three main feats that demonstrate his physical prowess. The first two involve comparing him to Tsuna's X-Burner:

Here we see Hibari was able to put multiple cracks in Adelheid's Diamond Castle after repeated attacks, the same Diamond Castle that was stated to be able to easily tank an X-burner from Tsuna (Chapter 321). He was also then able to destroy her Diamond Castle with his needle spheres (which I will expand on in a later section) by putting them into the cracks and having them expand (Chapter 323).

The other way Hibari scales to Tsuna's X-burner is through Daemon:

In his brief fight with Daemon, we see Hibari draws blood from Daemon with his hits twice and then punches a hole through him using a spike. This same Daemon was able to tank an XX-Burner from Vongola Gear Tsuna(Chapter 341, 342), which is just two X-burners in one, and later tank another X-Burner from Tsuna (Chapter 343).

Now, you're probably wondering how powerful Tsuna's X-burner is eh? Well, look no further than the Choice Arc:

First of all, Tsuna gets trapped in a massive illusion 1.5km around him by Torikabuto. He then blasts his way out of the illusion using an X-Burner with "sheer force". The first thing to note, the light from the X-burner could be seen many kilometres away and also created "huge tremors" from many kilometres away (seen in scan 3). The second thing is that in breaking out of the illusion Tsuna seemingly disintegrated several skyscrapers. What's impressive about this is that said buildings were stated to be more than 20 times as durable as regular buildings.

Secondly, we see that Tsuna's X-burner is around the size of a mountain when he uses it to finish Torikabuto in the last image.

So, we can conclude that Choice Arc Tsuna's X-burner is around mountain level

Something important to note about these feats is that both the statement from Adelheid and the X-Burners that Daemon tanked were relating to a Tsuna hilariously more powerful than Choice Arc Tsuna. I don't want to go too in depth because that would just drag out this section, but I can do if necessary in my next post. The TLDR of it is that Vongola Gear Tsuna is bare minimum several times stronger than Choice Arc Tsuna.

Hibari's last feat is probably his most impressive feat:

Hibari was able to stop a hit from Jaeger on two separate occasions (one of them he was helped by Mukuro but the other he did by himself). The reason I say this is his best feat is that Jaeger was strong enough to literally punch a hole in Byakuran (Chapter 399) as well as slice open Enma's back (Chapter 401).

As for how durable Enma and Byakuran are, Byakuran was able to tank an attack supposedly as powerful as Tsuna's X-burner from Complete Vongola Ring Tsuna (who is notably more powerful than Choice Arc Tsuna) and Enma survived an XX-Burner from Vongola Gear Tsuna amongst other things.

So, as you can see Hibari is an incredibly strong fighter when it comes to the damage he can dish out. As for his durability feats, they're a little harder to find but they're still pretty good:

First, Hibari was able to take an attack from Daemon who was using a copy of Hibari's Vongola gear (i.e. his attacks should be comparable to Hibari's own). It kinda doesn't look like he got hit, but the fact that's he's bleeding a bit clearly suggests that he did.

His other durability feat comes from his fight against Xanxus:

In this fight, Hibari tanks an attack from Xanxus. Xanxus at this point was directly stated to be stronger than Hibari by two different characters (Chapter 374). One of whom is stronger than both himself, and the other is Hibari's teacher. This is made even more impressive by the fact that Xanxus was actually stronger than they initially thought (Chapter 374).

The point I'm getting at with these durability feats is that Hibari is capable of taking what he can dish out. On top of that, Hibari actually has pretty ridiculous endurance feats:

First, we see that Hibari was able to completely neg a poison supposed to be strong enough to stop an elephant in its tracks, and this was Hibari fairly early on in the series (Chapter 127). However, more impressively he was able to continue fighting Mukuro at high speeds despite having many of his bones broken (Chapter 75). Mukuro was able to possess people and ignore their injuries, and yet he was completely unable to use Hibari's body, and he wondered how Hibari even managed to fight (Chapter 76). Reborn also stated that Hibari had been fighting unconsciously for half the time (Chapter 75).

So, to conclude, I think I've demonstrated that Hibari is a force to reckoned with physically, and also that it certainly isn't going to be easy to take hits from him or to put him down.