Com a dica de Theyna, eu achei Sukasuka, publicado em inglês como WorldEnd.
It's been over 500 years since the human race almost went extinct at the hands of the fearsome and mysterious "Beasts". The surviving races now make their homes, towns, and cities up on floating islands in the sky to keep out of reach of all but the most mobile of Beasts. Only a group of young girls, dubbed the Leprechauns, can wield the ancient Dug Weapons needed to fend off invasions from those dangerous creatures. Into the peoples' unstable and fleeting lives, where a simple call to certain death could come at any moment, enters an unlikely character: a mysterious man who lost everything in his final battle five hundred years ago, and had awakened from a long, icy slumber. Unable to fight any longer, the man, Willem, becomes the father those kids never had, caring for and nurturing them even as he struggles to come to terms with his new life, in which he feels the pain of helplessly waiting for his loved ones to return home from battle that his 'Daughter' once felt for him so long ago. Together, Willem and the leprechauns gradually come to understand what family means and what is truly worth protecting in their lives.
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Willem Kmetsch (ヴィレム・クメシュ Viremu Kumeshu)
Voiced by: Ryohei Arai (Japanese); Micah Solusod (English)
Willem is the main protagonist and only "alive" emnetwiht (人間族エムネトワイト, 'human'; from Anglo-Saxon) being in a world where humans have been driven to extinction by creations they call "Beasts". Known as the Black Agate Swordmaster, he is later found under a frozen lake after being cursed to petrifaction for five hundred years by the beast Eboncandle. He continues his fight against the Beasts, this time as the adviser to the "Fairies," since his body is too damaged to wield a Weapon after his battle with Eboncandle. As an active fighter he once wielded Percival, a mass produced version of the Dug Weapons (once called Carillons).
Abertura de anime
Encontrado com uma consulta de pesquisa de anime "romance leve" espadas lendárias talismãs orfanato