Northlad Gaien

Gaien is one of the Supporting Characters of the Ore dake Irerukakushi Dungeon.

Appearance
A man wearing a robe with a hood. After his fight against Olivia, he had just one arm.

Personality
A fake hero obsessed with the immortality. He was also savage and cold blood.

Background
An alchemist who was active two hundred years ago. Gaien was born in the Tonell Village, but he moved to the Hornest City years later, which he saved saved from monsters many times.

Obsessed with immortality, he tried by force Olivia to bestow it to him when she was in Hornest, but she defeated him, taking his arm. After that he gave up immortality and decided his name would be immortal.

It turns out that the occasional Demon March that had plagued Hornest for many years was caused by an item called the Peace Stone that he made because the town became peaceful and, by continuing to save the city multiple times, his existence wouldn't be forgotten.