|Japanese voice||Toshifumi Maeda|
Seguro is Apollonius' Fairy. It has the form of a giant dragon, and also its combat abilities are high.
Seguro's physical appearance resembles a Chinese Dragon. Its body is covered with dark, purple hide while Seguro's belly is pure black. Based from the town skit, Seguro is a gigantic fairy.
Not much is known about Seguro's personality but it is rather loyal to Apollonius.
More of Seguro's personality was shown in the Vile god route. He is shown to have dog-like traits as revealed in one of the side events in the Vile God route. It is also shown that despite of his fierce appearance, he is surprisingly friendly to his peers.
- Seguro is one of the few fairies who doesn't speak the human tongue, instead communicating by growls or roars.