Judging by the silhouettes, percival is a tiny death monster. Plus, evil arthur? And what of Meli, and Merlin and the rest? And I think that Tristan will show up at some point, much later in the story, or in a less important role.
Oh god, he's like goku at the start of dragon ball and it's kinda adorable... he even kinda has the hair... and he lived alone with his grandpa at the top of a mountain... and is ridiculously strong...
As much as we learn about matoba, I cannot bring myself to like him. Or even feel bad for him. He's just too ready to manipulate and sacrifice. And too ready to show natsume horrid things that no-one should have to see.
I'm a little confused. Is hibari a girl, or just non gender conforming? I kinda have a hard time telling with this stuff unless its explicitly stated as something that isnt played off as a joke...
The art style reminds me of something between arale-chan/early dragon ball and ranma½. I guess the time sorta matches. And the premise seems interesting.