von Voltaire, Gwendal

フォンヴォルテール卿グウェンダル

Cecilie's eldest son. Gwendal has objected to Yuri becoming the Maoh from the start. He is a skilled tactician, capable of using earth magic and casting barriers. When not otherwise occupied, Gwendal indulges in his hobby of knitting and sewing, though his creations often look nothing like what they are supposed to (for example, a bear was mistaken for a black pig, or a cat looked like a raccoon). He is adamant that knitting helps him sharpen his concentration, but it is actually a stress reliever for him since childhood. He is also quite fond of cute animals or objects, such as the dolphin keychain (Bandou-kun) that Yuri received at a dolphin show and later gave to him. His childhood best friend is Anissina von Karbelnikoff, an inventor who often tests her inventions on him, much to his displeasure. Anissina is also the one who taught Gwendal how to knit. Gwendal's left eye is a key to one of the four Forbidden Boxes, the "End of the Earth".
Gwendal is a tough guy, except when it comes to his childhood friend, Anissina, and his brothers. He is afraid of Anissina and often hides from her to avoid being used in one of her crazy experiments. He is even seen sweating in panic at the thought of her. While he does not outwardly show much affection towards his brothers, he shows in times of great stress that he does care; an example is his decision to stand against the Original King to save his little brother, Wolfram. Jozak, who was sent to locate one of the Four Forbidden Boxes, tells Conrad that Gwendal really cares for Conrad's wellbeing and doesn't want Conrad to worry, despite the Original King's wishes for Conrad to find the Boxes. His ancestor, Siegbert Voltaire, fought alongside the Original King.
When he was younger, Gwendal despised humans, a habit called Mazoku Pride by Dunheely Weller. On Dunheely's last journey to a nameless village, he told Gwendal to enjoy the ride before their last duel. Upon arriving in the village, Gwendal was shocked that the village was not recognized by Shin Makoku, and he led the attack on the bandits that targeted the village. In this duel, Gwendal saw Dunheely for who he really was: an old man, not the agile man he knew when he was younger. Dunheely later died of old age, and Gwendal buried him near the tree where Dunheely had told Gwendal what he was looking for. Years later, while on a picnic with his family and Yuri, Gwendal admitted that Dunheely was a larger existence than anyone else within him, because he hated that man.
Gwendal has no interest in love affairs, and even points out that issues arising from love affairs are beyond his abilities to influence. He does occasionally show care towards Greta, often being in charge of her while Yuri and Wolfram are on one of their adventures. Gwendal knows how to bake, as he does so for Greta when Günter, who would usually bake cookies for Greta, leaves the castle for a short journey. Greta comments that Gwendal's cookies look cute, while Yuri comments that Gwendal is good at baking, as Gwendal's cookies are made into animal shapes, similar to the ones he knits. When Greta asks Gwendal if she is disturbing him while he is doing work, Gwendal says, "Since it's you, I don't mind".
He is the commander of the demon army and often arrives with reinforcements when Yuri finds himself in big trouble. He is also the one who does the paperwork and essentially runs the kingdom for Yuri. Often enough, when Yuri leaves the castle, Gunter is seen barging into Gwendal's office, demanding to know where Yuri is. Gwendal would usually look tired and suggest an idea that sounds appealing to Gunter, for example, locking Yuri up in a room where no one will interfere.