Original sentence: To defeat such a foe, Kenshin is forced to resume his training and mend his relationship with his teacher Hiko Seijūrō, who taught and took care of him in his childhood
Edited sentence: To defeat such a foe, Kenshin is forced to resume his training and mend his relationship with his teacher Hiko Seijūrō, who taught and took care of Kenshin, originally named Shinta, in his childhood