Originally an orphan, he started training with a weapon at 11 in order to become a Brave. A jack of all trades, he exceeded in a myriad of techniques - earning him the title of  "strongest" Quasi Brave. After an hard fight, several curses caused by his techniques hit back, resulting in his 16 year old body being petrified in a frozen lake for 525 years.

When the events take place, he has been freed from the ice for two years with a deeply broken body caused by the petrification.

By the help of his boggard friend Grick, he becomes the caretaker over a military base run jointly by the Guarding Wings Military and the Orlandry Merchant Guild, where they keep special weapons - the Leprechauns.

Five hundred years have passed since the humans went extinct at the hands of the fearsome and mysterious ‘Beasts’. The surviving races now make their homes up on floating islands in the sky, out of reach of all but the most mobile of Beasts. 

Only a small group of young girls, the Leprechauns, can wield the ancient weapons needed to fend off invasions from these creatures. Into the girls’ unstable and fleeting lives, where a call to certain death could come at any moment, enters an unlikely character: a young man who lost everything in his final battle five hundred years ago, the last living human awakened from a long, icy slumber. 

Unable to fight any longer, Willem becomes the father that the girls 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 girls gradually come to understand what family means and what is truly worth protecting.

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Everyone wants to be remembered... Untold years after the strange Beasts drove humanity to extinction, Willem emerges from his slumber as the sole survivor. A new civilization of various other races has risen on the floating islands, but there'sno place for a featureless human among them. After aimlessly wandering for a time, Willem grudgingly accepts a job with the military, only to discover that the "weapons" he watches over are in fact young faeries. As he slowly learns more about the children and how they're linked to his past, the war with the Beasts grows increasingly desperate. When the girls prepare to fight a hopeless battle, is there anything a lone human can do...?
 (Source: Yen Press)

Revisit the tale of the faerie soldiers and their young instructor in these short stories featuring the three wielders of the most powerful dug weapon, Seniorious: Legal Brave Lillia Asplay, Chtholly Nota Seniorious, and Lakhesh. Although this virtuous white blade is drawn to wielders doomed to a fate of death and destruction, these girls never stopped yearning for a future they would never experience for themselves. 
(Source: Yen Press)

Five hundred years have passed since humanity went extinct at the hands of the fearsome "Beasts." Even up in the sky, where the surviving races dwell on floating islands, these monstrosities constantly threaten to bring death and destruction. Only a small group of young girls, the Leprechauns, can wield the ancient weapons needed to defeat these creatures. Into the girls' unstable and fleeting lives, where a call to certain death could come at any moment, enters an unlikely character: a young man who lost everything five hundred years ago, the last living human awakened from a long, icy slumber...

Lillia Aspley - A young girl and Legitimate Brave chosen by the great holy sword Seniorious. "You really are, after all, extremely bad at living, you know?" She said, while feeling complex emotions, to her senior apprentice who doesn't give up on standing beside her on the mission she is burdened with of protecting the human race. On the surface where monstrous creatures prevail, the days she spends are intense and at the same time endearing. This is the story of the heroes and the people who are living now in a land that will eventually perish.
 
(Source: Japanese Publisher, translated)

It's been five years since the battle at Corna di Luce on Sky Island 11 and the situation has gotten worse. 5 years ago, about two days after the battle at Corna di Luce on Sky Island 11, the Elpis Mercantile Federation accidentally lost control and released two beasts, Materno: The Fifth Beast Who Spreads Widely and Croyance: The Eleventh Beast Who Remains Rooted both onto Sky Islands 13 and 39 respectively. The result was catastrophic. In the end, both Sky Islands fell to the Beasts and many lives including those of the Elpis Mercantile Federation were lost. 

5 years later, Feodor Jessman, a young 4th Grade Officer whose step-brother was at the head of the Elpis Mercantile Federation attacks, spends his days training on Sky Island 38, hoping to climb up the ranks of the Guardian Wings Military to achieve a mysterious goal. One day, while skipping training to buy some doughnuts, he meets a young Leprechaun girl named "Tiat Siba Ignareo" who mysteriously asks him to forget her after a brief conversation. The next day, Feodor is assigned to be the caretaker of visitors from Sky Island 11. As the group arrives, Feodor is surprised to see Tiat among them, along with Lakhesh Nyx Seniorious, Collon Rin Purgatorio and Pannibal Nox Katena. 

Little do the two know, their meeting will change the very fate of the Sky Islands; as Sky Island 38 is set to be attacked by Croyance who is steadily approaching the island in Sky Island 39 even now; and a secret conspiracy lurks in the depths of the Guardian Wings Military. 
(Source: SukaSuka Wiki)

Willem Kmetsch