Strengths:
Jade's strengths lie in his quickly calculating mind. His judgments are accurate, leading to a sure victory. He is a master with the spear as well as fonic artes, with two very strong artes he uses in battle only when he has to: Mystic Cage and Indignation. He is skilled at getting under the opponents skin and weakening their defense. In most confrontations he is a smooth talker, good with words, and gets his point across, but he knows when his opponent is finished listening and has turned to using fists.
Jade's memorization skills are unmatched, being able to memorize texts in case they are lost or stolen. He is a veritable genius, reading opponents well enough to get the upper hand early in battle.
Weaknesses:
Though it seems Jade has few weaknesses, he is not impossible to defeat. Most of his skill is in long-range magic attacks (fonic artes). Casting leaves him open to close-range attacks. Mentioning Jade's past with replicas, Fomicry and Professor Nebilim brings him more pain than anything else. His comrades (friends?) are also a weakness of his though he pretends to have little to no feelings for any of them. It is clear Jade feels something like friendship for the people he traveled with. Jade's magic casting also requires fonons, an energy source inherent to his world.
Jade also admits that he “can’t really grasp what it means for people to die”.
Biology is also not his strong suit.