Later revealed to be the son of Weldeschtein Krom Raggs, Teito Klein is actually the prince of the former Raggs Kingdom, Wahrheit Tiashe Raggs.
After he was entrusted with the Eye of Mikhail during the invasion by the Barsburg Empire, Teito was hidden away and raised by his uncle, Fea Kreuz, as a church orphan. Unfortunately, when Kreuz passed away, Teito was made into a combat slave. He eventually entered the Barsburg military academy and became known as a star pupil.
Awesome cosplay by Yeu! This is one of her older costumes as she wore this at Katsucon in 2009, but it’s probably one of my favorites. Thanks to Julie for showing me her profile!