|“||How dare you throw off the schedule. In 3 seconds everyone dies.||”|
'Heath Grice 「ヒース・グライス Hīsu Guraisu」 is a rogue mage and member of the White Night Eye.
Heath is a slender, middle-aged man with slanted eyes. He is very skinny, which can be seen from the tone of his face, and also has a large chin. Additionally, he has short light-colored hair combed backwards. One of his most prominent features is the scar at the right-hand side of his forehead, which is elongated across his face all the way to his left cheek.
Heath wears an attire similar to a military uniform, which is also worn by his three subordinates. The attire consists of a dark-colored jumpsuit that covers his entire body with two belts strapped around his neck. On top of it, Heath wears a light-colored shirt with elbow-length sleeves that extend down to his knee. The shirt also has a short cape that only covers his chest area. The cape has circular ornaments at the circumference and a hood. Unlike Heath, the capes of the three subordinates extend all the way down and cover their entire body.
Furthermore, Heath also wears a three-way belt, which is strapped around his torso. In addition, he wears three more dark-colored belts around his waist, where he also places the pouch to carry his grimoire. Finally, he wears a pair of dark-colored boots.
He also has a pocket watch, which he uses frequently. The watch has a circular design with a button at the top. The button consists of a short tube with a sphere at the top, which is connected to another pair of tubes that are protruding to the sides. The tubes have an arc that connects them to each other. The watch has Roman numerals for the hour marks, and the hands are needles with a circular design near the tip. The pocket watch is in the possession of the Magic investigation department after Heath's death.
Heath was a calm and calculative person who was able to analyze his opponent and implement counter-attacks during his fights. Such examples were his analysis of Asta's abilities and execution of a move to dampen Asta's momentum when he charges toward him.
Heath also had a penchant on checking his pocket watch whenever he could, and he tended to put a timer on everything he did, such as his plans to execute the villagers in 3 seconds or breaking into Noelle's spell in 25 seconds.
Aside from being calculative, Heath was also very ruthless. He thought of people that live at the Forsaken region of the Kingdom as nothing more than brutes who do not deserve any attention from people of higher statuses. This also led him to underestimate and mock people whom he believed to be inferior. He also did not hesitate to take life as he could calmly perform an execution on anyone, even himself.
One day, Heath receives a mission in which he and three other mages are to search for a certain object. Heath visits Sosshi, which is located at the Forsaken region of the Kingdom. As he arrives, the chief of the village tries to hinder their mission, but Heath kills him. After that, he decides that he needs to eliminate the villagers before they could fulfill their main objective. Heath and his subordinates gather all the villagers to the center of the village to execute all of them, but he fails to do so when Magna Swing interferes by neutralizing his attack with a Fire Magic spell. Seeing that someone is messing with the timing that he predicted, Heath launches an attack toward them, but once again his attack fails to eliminate his opponents.
Heath remains unfazed when one of his subordinates points out that the mages are members of the Black Bull. One of the mages, Asta, asks him about his reasoning on conducting such an act of attempted murder. Heath decides to give an answer that discriminated against the villagers of the Forsaken region rather than revealing his mission. He then combines his magic with his subordinates magic in an attempt to assault all of them continuously and finish the fight as soon as possible. Unfortunately, his plan fails as one of the mages whom he insulted, Noelle Silva, casts a spell that protects all of them.
Heath is then ambushed by Asta, but he manages to soften the blow by freezing the ground where Asta was standing and quickly launches a counter-attack. He continuously tries to put Asta down while trying to break Noelle's spell. Suddenly Magna enters the fight by launching multiple fireballs at him and his subordinates. Feeling underestimated, Heath casually blocks the attack with his Ice Magic before realizing that a second wave of attacks are coming from behind him as Asta deflects most of Magna's attacks back at them. Realizing that the fire from the attack will not fade, Heath tries to freeze it but is surprised when Asta once again ambushes him. Asta's attack manages to cause Heath to faint.
When he regains his consciousness sometime later, Heath is restrained by Magna's magic, unable to use his magic. As Heath learns that he will be taken in for questioning, he uses a magic tool inside him to commit suicide along with two of his subordinates to make his employer's information remained a secret. As the remaining pieces of the men fall, their grimoires disintegrate, the only remnant being Heath's cracked pocket watch.
- Ice Magic: Heath uses this form of magic to generate and manipulate ice. Heath has been shown to be proficient with this magic as he could use it in multiple ways.
- Compound Magic: Heath combines his ice magic with his subordinates' Water Magic and Mist Magic to create a strengthened version of his regular attack.
- Grimoire: Heath possesses a grimoire that contains various ice-based magic spells. It has light-colored covers with diamond-shaped ornaments at the border each covers. The grimoire disintegrates once Heath commits suicide.
- "How dare you throw off the schedule. In 3 seconds everyone dies." 「よくも時間を 狂わせて くれたな 3秒後に 全員処刑 "Yokumo jikan o kuruwa sete kureta na 3-byō-go ni zen'in shokei"」
- Heath's favorite things are being on schedule and punctuality.