Einlion
Momo Quirk's creation can basically create anything non-living, so long as she understands how its made. So she cannot create viruses for example. since its a living being... technically... She mostly fights using physical means, but i feel that momo's quirk is extremely overpowered if used correctly. She just needs to learn chemistry/science combo and she can make anything. From extremely dangerous chemical bombs to different kinds of poisons for any situation. Such as Gas, injections, poison guns, or other substances that can affect the body. There are different kinds of them that can incapacitate someone with ease. A good example would be creating sleeping gas, she doesn't even need a container, she can just create sleeping gas directly from her stomach skin and wear a mask, similar to Nerumi but she cannot control where it goes. In closed environments, she would be undefeated unless the person has resistance to it. And even if that's the case, if one poison doesn't works, try another. Very few people have the necessary resistance. She could make poisonous guns that shot darts for example. She can make bombs with no problem either. She just needs liquid nitrogen and liquid oxygen mixed in a 1:1 ratio inside a container and ignite it to cause an explosion relative to the size of the bomb. Just a balloon filled with oxygen and nitrogen gas at 1:1 ratio causes a big explosion. As for the BIG GUNS. She just needs to make a bottle of nitroglycerin and she can make a huge explosion in contact. Just a strong impact can cause it to explode. Even a 1 drop of nitroglycerin causes a big and strong explosion. Let's not mention a 500ml nitroglycerin bottle, which would be 10.000 stronger at least.