MythicalFanFicGod

Kurumi from Date A Live, if I'm not mistaken

The 2D SCP girl. Basically, she exists within the 2D world of books, pages, and similar things. She can read a book, and transfer between them if you place them together, but is otherwise restricted to the 2nd dimension. She is no different from a normal girl, aside from that. If this combined with the SCP Universe, then that could be quite bad. Even excluding the BS characters people made that are supposedly Omniversal, Outerversal, or above that, there are countless world-ending events, including one of the SCP-001 proposals where, as Bill Wurtz would say, 'The Sun is a Deadly Lazer' that turns all it touches into freakish zombie-like fleshy abominations, and there are many reality warpers of such might and control that they could rewrite reality on a planetary scale, or places and entities that can erase people from existence, or various wielders of Pocket Dimensions that are essentially Omnipotent when inside it and can drag others inside. And that's to say nothing of the countless Universe-ending or timeline rewriting events, and even the occasional Multiversal crisis, like one of the SCP-001 proposals where YOU (Humans) are the Anomaly, which cause near-infinite timeline branches and/or alternate universes to spawn from their every decision, with each decision spawning new realities in which more decisions can be made in an infinitely exponential growth that grows more and more extreme every second, which through some formula by another universe's species, has been calculated that it should lead to Multiversal Collapse within something like a few decades (about 40) to a couple centuries (around 200) at most iirc.

The 2D SCP girl. Basically, she exists within the 2D world of books, pages, and similar things. She can read a book, and transfer between them if you place them together, but is otherwise restricted to the 2nd dimension. She is no different from a normal girl, aside from that. If this combined with the SCP Universe, then that could be quite bad. Even excluding the BS characters people made that are supposedly Omniversal, Outerversal, or above that, there are countless world-ending events, including one of the SCP-001 proposals where, as Bill Wurtz would say, 'The Sun is a Deadly Lazer' that turns all it touches into freakish zombie-like fleshy abominations, and there are many reality warpers of such might and control that they could rewrite reality on a planetary scale, or places and entities that can erase people from existence, or various wielders of Pocket Dimensions that are essentially Omnipotent when inside it and can drag others inside. And that's to say nothing of the countless Universe-ending or timeline rewriting events, and even the occasional Multiversal crisis, like one of the SCP-001 proposals where YOU (Humans) are the Anomaly, which cause near-infinite branches of your universe to spawn with every decision, that will eventually lead to Multiversal Collapse.

Every time I start to feel like the MC is a nice person, with all he does in saving other worlds, he then pulls needlessly cruel stunts like this, using his powers to do what is not much better than enslavement and mind control, with absolutely malicious intentions towards Talulah

'An Esper Who Wants to Be Ordinary!' - Mob Psycho?

'An Esper Who Wants to Be Ordinary!' - Saiki K?

Mumei from Kabenari of the Iron Fortress

Gooooood. Rokushiki, when mastered to a high level, could be great through using that Flexibility one to dodge or dampen the impact of attacks, or Tekkai to block attacks, but Geppo and the wind slash one are great as he could use Vector Manipulation to make even stronger wind slashes from his kicks, and the explosive speed of Geppo would be incredibly useful, especially if enhanced by Vector Manipulation to maximize the energy from each step, causing the force put into the ground (the opposite reaction) to be channeled back into the movement to double the force behind it. That's to say nothing of Haki, in which: Armament is amazing for causing damage to what normally can't be hurt, as well as enhancing the defensive and offensive properties of stuff massively, and in higher levels even causing technology to have greater strength or defense through infusion, and even allowing at the highest level for internal damage to all it strikes, which could be amazing against those that rely on technology like Power Suits, Armor, or high-tech guns and swords, or for completely destroying powerful regenerators by hitting every cell in someone's body. Observation is amazing for sensing the surroundings, predicting enemy movement and attacks, as well as (in higher levels) seeing through people's thoughts, intentions, and even somewhat reading someone's mind and personality from a distance, to say nothing of the synergy with Vector Manipulation with a greater sensory range and more insight into the surrounding, and that's not even considering the Future-sight ability. Then there is Conqueror's Haki, an amazing counter for large amounts of enemies and the weak-willed, dealing mental damage and even serving as a trump-card that could be used in bursts to overwhelm a powerful opponent mid-clash, creating an opening to attack them. This is to say nothing of the ability to tame certain animals, the damage to the surroundings that can be made by higher level Conqueror's Haki, or Conqueror's Infusion which massively increases the attack damage of each strike. Then there is the ability to create knots of Conqueror's Haki, that can be stored to be later released, which could be used like a consumable for an ally to help defend themself, or as a disposable weapon if it was stored in large amounts since it'd be hard for even those several times stronger to resist the combined conqueror's Haki of yours, combined with 100 simultaneously-released knots of such targeted at them. And then there is Observation-killing, which can make the user invisible to a Spiritual and/or Soul-based ability like Observation Haki, which would likely include some other means of observing people, especially if developed in such a direction, like defending against world's with an Observe spell or power, or technology sensing the user, or other sensory powers - like if Worm, DXD, or Harry Potter were included, it could likely defend against Shard-based observation and precognition, making nearly all Thinkers useless, defend against sensing one's magic and/or lifeforce or killing intent, making them undetectable under normal means, or potentially allowing them to bypass Magical Wards and Prophecies or magical detection and summoning.

I thought that Sword Saint was Reinhard and Half-Elf was Emilia, but wasn't certain since there's never been 2 people from the same world.

Breathing styles, while far weaker than most power systems and placing a lot of strain on the body, are still very good. The increase from Tanjiro's Sun Breathing merged with Water Breathing and Lightning Breathing around the time of the fight against Upper Moon 5, Hantengu should have given at minimum a 3X multiplier to his physical stats, on top of the sword techniques provided. I mean, look at the insane speed boost Zenitsu's breathing style gave him against that new Upper Moon 5 in the Infinity Castle.