Leonardo

Leonardo is a member of the Hero Faction. He is also the wielder of one of the four strongest Longinus, Annihilation Maker.

Appearance
He is shown to be a short, young boy.

Personality
Leonardo is shown to be a very quiet boy and is always seen without any expression on his face.

History
Not much is known about Leonardo's past, other than that at some point before the series, he was persuaded by Cao Cao to join the Hero Faction.

The Heroic Oppai Dragon
He appears in Volume 9 along with the other Hero Faction members.

In Volume 11, he gets kidnapped by Shalba and brainwashed who forcefully activated his Balance Breaker, creating thirteen gigantic monsters to attack the Underworld. This action, however, caused Leonardo to suffer severe physical and mental damage forcing him to be taken out of the front lines.

He was sent into the Realm of the Dead along with Cao Cao and Georg after having their Longinus taken by Indra in Volume 12.

The Legend of Oppai Dragon and his Lively Companions
Leonardo was mentioned in Volume 16 by Cao Cao who claimed that Leonardo stayed behind with Georg who is researching about magic in the Realm of the Dead.

Equipment
 Annihilation Maker (魔獣創造（アナイアレイション・メーカー）Anaiareishon Mēkā), Leonardo's Longinus,which is listed among the four strongest Longinus. It has the ability to create countless various monsters that the wielder can imagine, but he still hasn't fully mastered it yet.
 * Bandersnatch（バンダースナッチ）Bandāsunatchi): The sub-species Balance Breaker of Annihilation Maker. The Bandersnatch are over 100 meters tall and very powerful. They have the ability to create numerous smaller copies of themselves, where between 10 to 100 small monsters are created each time.
 * Jabberwocky（ジャバウォッキー）Jabawokkī): The sub-species Balance Breaker of Annihilation Maker. The Jabberwocky is over 200 meters tall and has a humanoid shape and even more powerful that withstand attacks of "The Emperor", Diehauser Belial, and his group. Like the Bandesnatch, It can create numerous smaller copies of themselves. The Jabberwocky also has incredible regeneration powers.

Trivia

 * Leonardo is the youngest member of the Hero Faction.
 * Leonardo is the only major Hero Faction member to not originate from a hero.
 * Currently, Leonardo is the youngest of the current Longinus wielders.