Luck Voltia

is a member of the Black Bull squad of the Magic Knights. He is referred to as the Smiling Battle Mania.

Appearance
Rack has long blonde messy hair, that goes past his ears and covers most of his forehead. He has a slender build, and a medium sized body.

Rack is seen wearing the usual Black Bull member attire, which is a robe that is black-colored and short with gold trimming and only covers the upper half of his torso. He is also seen wearing laced pants that doesn't pass his ankles, as well as light colored boots.

Personality
Rack has shown to be obsessed with a good fight, enjoying a hard fought battle to the point of smiling when finding a strong opponent and being pushed to the limits, as well as calling the fights that weren't very hard fought boring.

Biography
Rack was born into a common household and lived with an unknown woman whom confused with Rack's constant smiling. She slaps him in the cheek while asking him the reason behind his lack of other emotional expressions. One day, Rack defeats a noble in a school's tournament. His victory over someone of noble birth changes the woman's attitude towards him where she starts hugging him. Subsequently, she also encourages Rack to keep winning in the future.

A few years later prior to the return of Yami Sukehiro from the Magic Knights Entrance Exam, Rack is confronted by Magna Swing for eating his dessert. The confrontation leads to them destroying part of the Black Bull's headquarters. As soon as Yami returns and telling them to stop, Rack immediately greets him along with everyone else. Rack then goes outside of the Black Bull headquarters, along with everyone else, to witness Magna's initiation of the new member that Yami brought with him. After that, Rack congratulates Asta on passing it along with the rest of the members. He also reveals his desire on wanting to fight him immediately afterwards.

Later on, Rack wakes up from all the ruckus Noelle's out of control magic was doing, and witnesses Asta taking it down with one swing of his sword. Rack is then joins everyone for a meal at the dining hall, and helps explain the responsibilities of the Magic Knights.

A few days later, Rack goes on the mission with Noelle Silva and Asta to explore a newly emerged dungeon. As they enter, he suggests that the bird currently following Asta should be called Nero after seeing Asta and Noelle argue about it. They eventually arrived at a room full of traps. Rack then purposefully pushes Asta into one of the traps after seeing him capable of countering the trap he accidentally activated himself. Rack then begins to activate numerous other traps and sends Asta and Noelle in a running spree. Suddenly, Rack senses that there are more people in the dungeon beside them. After locating the strongest one of them, he quickly dashes towards him while leaving Asta and Noelle to conquer the dungeon on their own.

Rack begins to traverse through the dungeon in a remarkable speed, trying to find the strong opponent he had sensed a moment ago. He eventually finds his target and starts taking out the said person's underlings without much trouble. Rack then challenges the mage that he believes to be the strongest within the dungeon. The said mage tries to leave without fighting, but Rack manages to contain him by relentlessly attacking him even though none of his attack gives any significant damage. Rack continues to try and hit the mage but to no avail, as the mage keeps using his smoke-based magic to dodge him. Rack then suddenly feels lightheaded during the fight and the mage reveals that he has been activating a magic spell that weakens his opponent from the very moment Rack arrived to fight them. As the mage tries to leave and let Rack weakens even further, Rack starts to hear voices inside his head and gets back on his feet. Rack continues his assault while demanding the fight to continue. Rack blindly attack the mage, while remembering why he can not loose. He uses the spell, thunder clap, trying to finish off the mage but is ensnared within a smoke based trap, binding him and stopping him from moving. Rack, while trapped, thinks about what he was after and before being killed by the mage, Asta comes to Rack's aid, destroying the Mages spell wanting to protect his teammates.

Magic

 * Lightning Magic: A form of magic that enables Rack to manipulate the element of lightning. Rack uses this magic by concentrating the lightning on his hand before releasing it towards his opponent.

Abilities

 * Immense Mana Sensory: Rack has been recognised by all captains of the Magic Knights for his ability to sense Mana from a great distance. Yami Sukehiro also praises him for surpassing even nobles on his prowess with this ability.
 * Enhanced Durability: Rack has shown to be very durable to magic attacks, getting up from the Diamond sorcerer's disabling attack, as though it was nothing.

Equipments

 * Grimoire: Rack possesses a grimoire that he used to enhance his lightning-based magic. The grimoire has plant-like designs on its covers.

Fights

 * Rack Boltia vs Diamond Sorcerer