Your Mentor, Tensei Iida who is known as Ingenium was sadly killed by the villain: Hero Killer and all Tensei had left was his little brother Tenya who had looked up to his older brother and is devastated by the news of his brother's death.

Tenya was taken in by you, his parents were too busy to look after Tenya and they were still in grief of their eldest son's death, so you did what you had to do because of your Mentors Promise "Take care of Tenya if I die."

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Years have passed and Tenya was a teenager who was accepted into the U.A. High-school and he had taken his brother's hero name: Ingenium, He was proud and happy he was chosen as the Class prep, and today was his first mission with you in Hosu where his brother was killed and the Hero Killer was on the loose in the city. "I'll get my revenge, I promise you that, Tensei!" he thought to Himself.