Appearance: Check the "novel cover."
-Due to some unknown reasons, Tatsuya seemed to have gained all of his emotions again.
-Due to Tatsuya being genetically modified, he has "augmented body" that could be said "strong" against humans, but "weak" against cultivators.
-His late mother, Miya, forcefully changed his "experience" into "knowledge," he gained the mental ability to memorize every single thing with a single try.
-Although, he had gained his emotions, it would not fundamentally affect him, he could still maintain his stoic expression, and kill people like he was walking in a park.
-Tatsuya has a humongous amount of psions contained within his body, allowing him to use his magics for only 100 times within the ATG world. Upon losing all of his psions, his abilities would be unusable.
Abilities:
-Physical Abilities
*Ninjutsu - Tatsuya is already surpassed Yakumo (his late-master) in terms of pure-martial arts. However, such arts are useless before "cultivators."*
-Supernatural Power User
*rendered useless due to lack of psions and pushions in ATG universe*
-Born-Specialized Magician
*rendered useless due to lack of psions and pushions in ATG universe*
-Innate Abilities (or Magics)
*Elemental Sight - An ability that allows Tatsuya to link himself into the information dimension. It also allows Tatsuya to "see" the past and present.*
*Decomposition - An ability that allows Tatsuya to break down any areas, objects, or organic beings into bits by bits with the help of Elemental Sight. This ability is useless without the aid of Elemental Sight, because this "sight" enables him to "see" the targets from its surface appearance down to its molecular structure, allowing him to break down the target's structure down into atom levels.*
*Regrowth - An ability that allows Tatsuya to restore back any areas, objects, or organic beings with the help of Elemental Sight. The "regrowth" ability without "Elemental Sight" is only useful in restoring himself. However, even the "regrowth" uses psions, lack of psions will render this ability useless.
*Baryon Lance - An ability that allows Tatsuya to a neutron beam with the speed of 10,000 km/s. It could be said useful against "cultivators up to Sky Profound Realm" but above that, it would be nothing but an ordinary beam waiting to get demolished.
-Systematic Magic
*Flash Cast - rendered useless, because every "cultivators" can insta-cast any abilities.*
*Fixed Deceleration - Allows Tatsuya to slow down the movement of an object. This ability will only work against "cultivators up to Nascent Profound Realm," by then it would be useless, unless Tatsuya gets stronger.*
*Water Spider - It is a surface tension amplification magic.*
*Douden Himaku - An ability that momentarily allows Tatsuya to reduce the electrical resistance approximately to zero of his clothes, or shoes, making his clothes sturdy enough to resist a weak attack.*
-Non-Systematic Magic
*Gram Demolition - rendered useless, as "cultivators" don't use "CAD" when attacking.*
*Far Strike - rendered useless, unless he has Miyuki who will be his "eyes" to see the "soul" of the target.*
*Gram Dispersion - rendered useless, as "cultivators" don't use "CAD" when attacking.*
*Specific Cast Jamming - rendered useless, as "cultivators" don't use "psions" when attacking.*
*Gatekeeper - rendered useless, as "cultivators" don't use "magic" but "profound techniques."*
*Psion Marker - rendered useless, due to lack of psions in the material world.*
Note: Some magic could be converted into "profound techniques," if ever Tatsuya managed to do so. First, he must at least gain "profound veins" to use "profound energy," allowing him to modify his "late abilities" into "useful abilities that could be used anytime." Second, due to lack of psions in the material world, Tatsuya is basically weak at the moment. Aside from his martial-arts experience and techniques, fighting a "cultivator" is basically asking them to kill him.
Another Note: Please give me more plot-lines based on this abilities. Such as, "how will Tatsuya convert this abilities into profound techniques."
PS: Some abilities might be wrong, and please do so correct me. I have only read the Light Novel up until Volume 18. Thank you for reading this...
Credits to Mahouka Koukou no Rettousei Wiki