Rip and tear. Stab and slash.
He watched the black creatures as they tore into human after human, spreading carnage through the streets of the village.
Unfeeling, he was effectively invisible to the creatures. He was far from invisible to the townspeople, though. The moment they saw him, they'd run screaming, variations of "What the hell is that!?" and "Oh god! Run!".
His form is that of a tall and lithe humanoid shape with large black bat-like wings jutting out from the back of his waist. His skin was bleach white, and he had no mouth or other facial features aside from piercingly green eyes, with black marks running from their middle down his face. His head had 3 ridges down the top with 2 long horns spread out on either side of his head, and long black hair running down his back, reaching at least his lower back. In the middle of his chest, where his heart would be, is a hole straight through his body, completely see-through. Black markings gave the illusion of dark liquid seeping from the hole down his chest.
He had appeared in the middle of this carnage, created from a cloud of swirling dust. He looked at the monsters, comparing them to the ones he knew. Some of the creatures had armor, some didn't, but they all had masks like hollows. But they didn't have holes. He calculated. Walking towards an unknowing Beowolf, he impaled his hand through the creature's body, right below the neck. It sputtered before going limp, fading into black dust as it 'died'.
He looked at the humans fighting them. They had a spiritual presence, but the creatures did not. These 'hollows' had no soul. 'Impossible.' And despite them eating the warriors, they gained no power. For what purpose did they hunt? He swatted a few more away, watching as they dispersed into particles. Many of the townspeople watched in awe as he cleared the creatures out. A few Beowolves, an Ursa, they weren't much of a task for him to clean up as he repeatedly vanished from view and severed them limb from limb. 'They would likely get in the way if I continued to let them fight.' He watched as the last grimm vanished with disdain. He looked at the buildings around him. 'Old Japanese architecture. Though this isn't the soul society. Where have I appeared?'
He stood, thinking, until he was approached by several of the town's warriors. "W-What is that thing?" "We have to get rid of it, it's a Grimm!" "It attacked the Grimm!"
One man stepped forward from the crowd, a huntsman with spiky brown hair and weary hazel eyes. He was clad in a short-sleeved jacket and black pants and boots. He wore a chestplate, but one of the shoulder straps is snapped and half of the upper section is completely ripped off.
"Everyone, calm down. This... this thing.. saved us!" He turned back to them. "Didn't you see how easily it took out those Grimm? If it wanted to kill us, we'd be dead."
Having no mouth, he couldn't speak back, but he nodded. 'I may as well play along. They wouldn't be much of a threat even if they were to try and attack.' The brown-haired huntsman grinned. "Holy shit... Just what are you?"