Sixtus

Sixtus is the second biological son of King and Diane and one of the princes of the Fairy Kingdom. Because he inherited more fairy blood than giant blood, he has a small and delicate appearance, much like his father when he was young.

From a young age, he has lived in the Fairy Kingdom with his family. Although he was born with enormous magical potential, something has always made him insecure: his wings haven't grown yet, making him look smaller than even some of his younger siblings. This situation is very reminiscent of King's childhood, who also took a long time to develop his wings.

When Nasiens arrives in the Fairy Kingdom, Sixtus participates in the family reunion. During these events, he proves to be very observant and is one of the first to notice that Nasiens possesses a giant-like ability to detect minerals and plants.

Later, during the Fairy Kingdom arc, Sixtus enters battle to protect his home and demonstrates that, despite not having fully developed wings, he possesses extraordinary talent. It is even mentioned that he has the potential to become the next Fairy King.

*Race: Fairy-giant hybrid.

• Gender: Male. Reddish-brown hair. Amber eyes. *Short stature.
• He wears a yellow and white hoodie, dark green pants, and yellow boots. It looks very much like King before he developed his wings.

*Very serious.

• Intelligent and analytical. *Sincere and direct.
• Distrustful of strangers. Protective of the people he loves. Compassionate and kind when he gets to know someone better. *Very confident in his magical abilities.
• Embarrassed that he doesn't have wings yet.

As King's son, he inherited enormous magical power.

Among his skills are:

*Levitation and flight.

• Reading thoughts and emotions. *A great deal of spiritual magic.
• Very little physical strength (just like his father).

Sixtus uses the Spirit Sword Magliastira, a weapon capable of changing shape in a similar way to King's Spirit Spear Chastiefol.

*Father: King

• Mother: Diane *Older adoptive brother: Mertyl
• Older sister: Nasiens *Younger siblings: Belte, Zana, Zilian, Phao and Tioreh.
• Aunt: Elaine *Uncle-in-law: Ban
• Cousin: Lancelot.

He is the son who most physically resembles King when he was young. Despite not having fully developed wings, he can levitate like most fairies. He is considered one of the future candidates to become the Fairy King thanks to his enormous magical power. She debuted in chapter 138 of the manga. So far, her role in the anime is much smaller than in the manga.