He also spent those years being bullied, rejected or ignored by all other kids.
When he was 12, his parents divorced and he stayed with his mother. During the last semester of school that year, he scored very high on an Aura ability test part of the normal orientation
Let's lead into this guff by talking about Nathan's mind. A way to see it is to picture an immense star (as in, the thermonuclear thinamajig), burning incredibly bright (Light), at the center of which is an infinitely small point of absolute black (Darkness). Surrounding the star is a very thick layer of armour (to scale, thicker than the Earth's diameter) which isn't actually solid, but an incredibly expansive labyrinth, the walls of which are nigh-impervious to all kinds of damage. Nathan usually tends to try and fuel the Light by having fun, being with friends, satisfying curiosity and other such pleasant things. This is the main way he keeps the Darkness contained to such a small spot. The Darkness, however, can also be fueled - grim thoughts like torure, death, decay and things of a more eldritch nature tend to make the Darkness expand.If you somehow - with your words or actions - find your way to the Light, it will be damaged, and Darkness will rapidly extend tendrils towards the breach, escaping onto the surface. The Darkness manifests itself in several ways: the more of it, the more obvious it is. Nathan's face will get more and more emontionless as his words change to calm threats. Failure to take these threats seriously - supposing what you did wasn't serious to make him snap instantly - will make him attempt to kill you. And that's not an understatement: his entire being will become solely focused on destroying the ones responsible for the Darkness' release.Other signs include small, pale black tendrils that start appearing around him and become darker, more numerous and more opaque the worse he gets. The air will seem to grow cool and stale, while sounds will start being muffled. His irises will take on the slightest tinge of red while his pupils contract to a point. If you somehow stare at the pitch-black Aura (after all, he's trying to kill you, so it's not likely to happen), after about 10 continuous seconds, you will start hearing voices. They, however, are your own. The voices will progressively get louder and if you somehow manage to stare at it continuously for over an hour, you will probably have suffered severe psychological trauma.
His semblance is Energy: that is, he can control his own kinetic energy. To be more clear, he can turn his Aura into kinetic energy, but only within his body. The energy being inherently associated with momentum, he only uses it for powerful blows, lest he fling himself out of control to go faster. It is worth noting that he has never told anyone what his semblance is and that he tries to use it as little as possible.
Here are some examples of the uses for scale.Hits: - Like a speeding truck for 60% of his Aura. - Like a speeding car for 40%. - Unusually powerful blows for 5% (enough to severely stun most Grimm).Numbers: These are based on the examples above, if applied to someone with an average Aura. - 1% --> 4% Aura damage - 5% --> 20% Aura damage - 10% --> 42% Aura damage - 15% --> 65% Aura damage - 20% --> 90% Aura damageAnything beyond that will merely do more damage, beyond the now-shattered Aura, with the semi-exponential function still applying. The amount of seconds he must wait before his Aura is usable again is equal to the percentage of Aura consumed.
30 cm long, 6.8 cm diameter matte black cylinder with 2 dark lime green lines on the wall 10 cm from the bases. This form is usually used for carrying around in a non-combat situation, affixed to the back of the harness or for performing short to medium-short range attacks. The bottom opens up when engaging the jetpack. The central section is dedicated to housing the power cores and control mechanisms, the upper section (there's a symbol on it) is dedicated to the cannon and first staff mechanisms while the bottom part is dedicated to the jetpack and second staff mechanisms.
The weapon functions with Dust all over. By using the power cores in conjunction with small Dust crystals integrated within Ergia, using thermal energy and electromagnetic energy is also possible (examples: firing plasmoids; producing bunsen burner-like flames; electrifying portions of the staff; superheating a layer of gas around the desired portion of the staff to make it capable of easily slicing through basically all organic materials, but takes some time to heat up things that melt at a high temperature, say chromium or tungsten).
The top section of the staff contains 3 dust cells, of which a very small amount is used each time he fires a sniper shot: this shot infuses a large amount of energy into the dust, which is then vaporized and propelled at significant fractions of the speed of light towards whatever he is aiming at (for the effects, they are similar to those of a highly collimated stream of relativistic particles). Non-sniper shots are merely energy.
Lastly, he also keeps 2 crystals (which he names "LR crystals", for Last Resort) in 2 pouches. These crystals, also custom-made, are made to store positively gigantic amounts of energy each at the cost of being able to release it. When all hope is lost, he can load one of these crystals into the cannon assembly and, using a mechanism present within the firing chamber, render them extremely unstable. Shooting them afterwards, a strong impact will then make the crystal simultaneously combust and release all of the previously accumulated energy, with absolutely catastrophic consequences. Anything Grimm or otherwise not protected by Aura will get heavily pulverized/incinerated within a 10 m radius. Destruction and Grimm injuries are still present up to 15 m and anything beyond that consists in brutal knockback to slight breeze. They are a dark, dull pink when empty, very bright pink when filled (staring for more than a few seconds may induce discomfort and afterimages) and an incredibly brilliant gold when full and rendered unstable.