Thanks for the chapter!
Typical MC, specialized in everything a real OP calamity once trained. Seems like he has a big crush on Marika and vice-versa. Speaking of which, why is he calling her Marika and not Marika-san as just the name is only to be used by family or someone really close to her after receiving permission and could be considered rude for not having -san or something at the end?
Not sure if it's due to word usage, translation issues, or something else but 2 of the 4 types of aura seem off. Slash for bladed weapons is ok, and Guard is accurate for defense specialized classes, but Sting for projectile weapons is off. Should be something like Missile or Ranged as sting usually refers to something, like a bee, stabbing at point blank range with a barbed poisoned needle that is left behind. As for Hit that's too vague, should be Crush or Blunt as rather than using a blade to make cuts on a focused edge it increases blunt force trauma with weapons that crush or spread damage on area hit.
@DeathDonut MC isn't saying he doesn't have any experience using a sword, he's saying he doesn't have any experience using aura much less aura on a sword. He's probably skilled using a sword but considering most of his work was advisory, tactics, personnel management, and supply management he probably didn't use it much for fighting. That and could only use his physical abilities with a sword as couldn't use demon magic and there weren't any humans to teach him about using aura.