Which SNK Titan Are You?

Thousands of years ago, the first Titans originated from a group of ordinary humans called the Subjects of Ymir. An anomalous, insect-like organism bonded with Ymir Fritz to become the first Titan, or the Founding Titan, with their spinal fluid capable of turning other beings into Titans upon injection.
Ymir’s daughters inherited her Titan abilities, splitting them into multiple types. Over several generations, nine of her descendants inherited the powers that would become associated with the Nine Titans.
The full roster of the Nine Titans is composed of the Founding Titan, the Armored Titan, the Attack Titan, the Beast Titan, the Cart Titan, the Colossus Titan, the Female Titan, the Jaw Titan and the War Hammer Titan. The abilities and appearances of each of the nine giants diverged greatly from one another.

Perpetually-smiling monsters and villains can be unsettling to many people. We see an expression people relate to joy and other positive emotions, and then we find it on the face of something out to hurt or kill us. Such a dissonance triggers alarm bells in our heads that something is profoundly wrong.
While there is no official explanation for why Titans smile a lot, it can be seen as a creative choice to better convey the fearsome nature of these gargantuan monsters that take delight in ruining human lives.

Titans generally produce large amounts of heat as they transform. One of the Colossal Titan’s defining features, however, is its ability to produce catastrophic explosions.
We can largely attribute this to the proportional increase of heat it releases upon transformation compared to other, much smaller Titans. It can also eject steam from its body at far hotter temperatures and in much larger quantities, thus causing an explosive release of material that can even appear as the mushroom cloud of a nuclear detonation.