"Two times, Aye... two times I did save this world, yet I did it with everyone else too, not just only me."

Meet Blade Zantorian, the Ark Knight, Old man on his 70's, and the third mentor for Arthur when comes weapon training & technique
The one and the first legendary hero before Beowulf, Venris & 5 outsider heroes take up his mantle for saving the world next, he who take up arms to the Darkness invasions within the worlds, two times he manages to prevent and victorious upon it, blessed by unknown power as he still retain his prime strength even in his old age.

As Ark Knight himself, he excels in any weapons (preferably swords), can use any Knight skills, able to raise morale of his companions by his word of rallies, to guide them into victory. Or sunder the enemies morale & mental.

Fun fact, he is my very very... Very older OC I've ever make, before Arthur, Dan, Beowulf and others. Back when third Junior High, I think I already make 3 - 4 books of his story as protagonist along with Beowulf