Runeverse: Dawnstrike Assassins

Fenrius Nightfang had a bad start being a beggar, slave, and thief, but he has a big responsibility with many roles. He is the leader of the children's gang in the sewers, the boy who brings blessings to the village of Nightville, the little devil who dared to stab the Black Hydra, rebellion and redemption is his sword, reminiscing is his nightmare, and being reborn is his destiny. Until he left his past; away from the continent of Ardaenor.
After the tragedy of the Chthonian Invasion and the Kaliyuga Explosion on the Malazen Continent, the young Fenrius, getting a good chance from the Academy, became a death squad to carry out a suicide mission against the Chthonians, and that was what he had been waiting for all this time to test him on how far he could go after escaping the angel of death a million times.

This story is inspired by my favorite Seinen Manga such as Berserk, Attack on Titan, One Punch Man, and others. Until it became a world in the high middle ages lol.
Anyway, this is not only a story about the main character, but Multiple Lead Characters.