Garfiel Tinsel is the former guardian of the Sanctuary and a member of the Emilia Camp. Introduced during Arc 4, he became one of the main supporting characters of the season. He's a half-beast human and Frederica Baumann's half-brother. He can transform himself in a giant golden tiger that can deal powerful attacks but with a cost of losing his reason, so he uses this ability when he's pushed to the limit.

Garfiel and Frederica lived together until she left when he was around 4 years old and he hadn't seen her since until their reunion 10 years later during the Sanctuary incident. After seeing his mother's "death" during the trial at a young age, he began to fear the outside world, causing him to try and protect the Sanctuary.