Vesture Kloff Di Laufen

Vestia Croft Di Lofan (ヴェスチャー・クロフ・ディ・ローファン) is a former adamantite-ranked adventurer and he is also the mentor of Gazef Stronoff.

Background
Lofan was an accomplished adventurer in his time. Thirty years ago, he was part of an adamantite adventurer team that braved the depths of the northern Tob Forests to retrieve a rare herb.

After he retired, Lofan opened an exclusive sword school for pupils he chose himself. He personally trained the future Warrior-Captain through a hellish regimen of sword training and lectures.

The Sealed Evil Tree Arc
Lofan's name was mentioned during the conversation between Momon and Pinison Pol Perlia in the northern Tob Forest.

The Magic Caster of Destroy Arc
At a war conference in the Re-Estize Kingdom, Lofan's name was mentioned as one of the retired adamantite adventurers that exist in the capital. Later his history is further explained by Brain Unglaus to Climb during Gazef Stronff's duel with Ainz Ooal Gown.

Abilities
So far, it was revealed that Lofan is a highly skilled martial artist and swordsman. Lofan himself has developed a stronger technique that surpassed the Sixfold Slash of Light , however, he was unable to utilize it to its full potential due to his advanced age, which he then taught it to Gazef Stronoff.

Gazef Stronoff
If Gazef hadn't met the retired adventurer, his fate would have been to become a mercenary. It was Lofan who dragged him into his school and taught him all the skills of the sword, leading him to become the Kingdom's strongest warrior.