L'Arc Berg Sickle/Relationships

Naofumi Iwatani
L'Arc along with his comrade were tasked in killing the four holy heroes of the other world, especially the shield hero whom Glass considered as a threat. L'Arc heard about Naofumi, from Glass & also other rumors of the Shield Hero from Melromarc commoners and he completely believed the rumors. He even encountered a number of fake heroes and got fed up in his search.

When he came to face to face with Naofumi, he was too friendly with him and refused to believe him to be the shield hero, as he claimed to be. As Naofumi didn't seem to fit any of the bad rumors circulating around the Shield Hero and assumed Naofumi to be one of those who pretends to be shield heroes.

After learning that Naofumi was indeed the Shield Hero, he tried to kill him in a fair fight. He was thrilled to fight Naofumi and enjoyed the resourcefulness of the Shield Hero. He refuses to believe all the rumors of Naofumi's evil deeds and claims there must be a reason for his doings.

Ren Amaki, Motoyasu Kitamura, and Itsuki Kawasumi
He didn't believe them to be the heroes as they claim to be and thinks that they are one of those who pretends to be a hero like the fake shield heroes. He easily knocks them out with a single slash and worried that he might kill them if he uses a little more force.