Homegoroshi

Homegoroshi is a main supporting character in the series.

Kristian Atalanta
Homegoroshi often refers to Kristian fondly as the only friend he's ever had.

Lunia Atalanta
As Lunia's appointed guardian, Homegoroshi is the one who solely raised Lunia from age 11 to present day. He often helps her on missions, but usually receives little to no appreciation for what he does. However, despite being used as nothing more than transportation most of the time, Homegoroshi cares about Lunia as though she were his own daughter. This is further emphasized by Homegoroshi's promise to Kristian that he would keep Lunia safe no matter what it took.

Still, there is some debate as to whether or not Homegoroshi's feelings for Lunia were ever romantic. This stems from the similarities to Kristian that Homegoroshi sees in Lunia

Emperor Idnagi
It is unclear what sort of relationship Homegoroshi has with the ancient Emperor of Gaildasia, Idnagi. However, it is known that Idnagi holds a contract with Homegoroshi, meaning that the dragon must obey whatever Idnagi orders him to do.

Trivia
Home-goroshi in Japanese means an act of excessive praise, which actually implies the opposite.