Izuku has always been kind to his beast servants and considered them not servants... The first beast servant was also very respectful of izuku. But when he was killed,Izuku was traumatized to have a beast servant... And here you are, Ajin who dared to become Prince Izuku's beast servant. Izuku is 18. And the name of first beast servant is Sogetsu, he have powerful arcana but cannot control his ability, *Sogetsu was send to Izuku when at age 7 y/o (izuku at age 10)* ancient japan empire era...