Gaelion

Gaelion (ガエリオン) is a dragon hatched and raised by Naofumi. He is named after Wyndia's adoptive father, Gaelion, who was killed by the Sword Hero.

Appearance
Gaelion appears to be a small orange dragon, he has tiny wings on his back and has no scales. He has two horns and has a fat tail. However, Gaelion has the ability to shift his size, changing into a more adult form better suited to combat than the relatively small infantile body, and back into his small dragon size when preferred.

Personality
Gaelion suffers something of a split personality disorder as a consequence of eating a Dragon Emperor core. However, as Gaelion grows older his multiple personalities will gradually merge together.

The first and most dominant personality is that of the infantile body, the original inhabitant of the body. This personality deeply loves Naofumi as a parental figure and has an extremely playful personality playing with Wyndia and desiring to play with Naofumi.

The second, less often seen personality is that of the Old Gaelion for which the infant was named for, this personality shows a degree of wisdom rarely seen among his kind and is usually defined by his love for his adoptive daughter Wyndia and a lingering grudge against Ren Amaki for killing him. Eventually, after seeing his daughter being taken care of by the Shield Hero in his village, he agrees to lend a hand. He prefers to remain silent when in the presence of Wyndia, as to let her live unknowing of the effects of the dragon core.

After eating the Demon Dragon Emperor core, Gaelion was temporarily possessed by a dominating third personality - the personality of the Demon Dragon Emperor. This ego was evil, vicious and highly intelligent. However, it eventually separated from Gaelion and was exorcised.

Background
Gaelion's egg was among the large amount of gifts Naofumi had received from either Siltvelt or Shieldfreeden. Encouraged by Wyndia, he decides to raise the dragon and name it Gaelion after Wyndia's adoptive father. After getting annoyed about comments on his female companions, Naofumi decides to set Gaelion's gender as male.

Trivia

 * The Gaelion in the spin-off series is a complete different monster from the Gaelion in the main series. This different Gaelion is a half-dragon monster who was raised as Wyndia's half-sister. However, this half-dragon was probably killed when Wyndia was captured in the main series.