Tried to find a fitting name for the mc that fits his blacksmith system and Ornn's image. I think Ignis Fireheart also blends in with One Piece's naming style like Edward Newgate, at first I wanted to give him a Japanese name but it sounds out of place with names like Luffy, Zoro, Usopp and Sanji soo I chose a different style.
The story is funny he fits in the squad, he doesn't replace anyone cuz his role is the blacksmith. Ignis is kind of OP but he won't go to the top dogs lvl right away, when he blocks Hawkeye's attack Hawkeye wasn't really aiming to kill Ignis he was just challenged to try to attack the Randuin's Omen specifically by the mc to try and break it. If Hawkeye wanted to defeat the mc he can just go and ignore the shield and just murk the Ignis right away.