hantengu demon slayer

Noah piloted his clone, having it dodge the oncoming storm of attacks. He could have easily beheaded them from behind, ending their life with their final moments being fear and confusion, but he wanted to study his opponent. The more skilled they were, the more useful an asset they might be. Common trash could be executed, but it would be a waste to kill a potential ally. This warrior was fast and experienced, blending their rapid and complex movements perfectly. Yet, despite their skill, Noah kept his clone out of their range.

idk if you've played chaos;head (or watched it, I never saw it so idk if it's in the anime) but it's set in the same world as steins;gate (which I've watched but never played) and things the eyes see but the brain doesn't process are a literal plot point, you could almost certainly make a fairly lore accurate manip with that if you like this world.

As Ziradith cackled about her plans, Noah walked the silent evening streets back towards Valia’s home. Shannon had insisted on transporting him to the palace on her back, but he abstained, telling her that he wanted to do some night fishing and she might scare the fish away. His first catch tugged hard on the line when an attack came, a ring of glowing wind passing through his clone and striking the ground. Noah, walking several feet away in his invisible state, turned and looked up at a nearby building, with his clone mimicking his actions.