Complex sentence: In a flashback, he wears the name tag of "Vermillion," from a dragon knight who found him in a bloody area with slain soldiers and a young girl in his arms.
Split into simpler sentences: In a flashback, he wears the name tag of "Vermillion". It has also been noted he got his name by a dragon knight when he found him in a bloody area with slain soldiers and a young girl in his arms.