Belmod's History
Background
Belmod was born over 267,974 years before Age 780. In a bonus sketch by ToyotarÅ, it is revealed that a long time ago, Belmod used to be a member of the Pride Troopers in Universe 11 when he was young, as well as a very good friend and companion to Gicchin, Jiren's ex-master. However, the former became a God of Destruction because he hated Gicchin's "dumb" ideas about the importance of teamwork.
Belmod became a God of Destruction around 267,974 years before Age 780. He became a God of Destruction due to his belief in power over his friend Gicchin's belief in teamwork.
In the manga, at some point in time Belmod participated in the All Universe Hide and Seek Tournament held by Zeno. But when Beerus hid and fell asleep for fifty years during the tournament, it had to be canceled. He and the gods had to calm Zeno down who was furious. Since then Belmod and the other Gods of Destruction have felt disdain towards Beerus.
At some point during Belmod's tenure as God of Destruction, he was drawn to Jiren's quest for strength.
Dragon Ball Super
In the manga, Belmod planned on retiring as God of Destruction, and so was training Toppo to take his place. Prior to the Great Priest calling the Gods of Destruction to a meeting, Belmod was being pampered by women on a planet he planned to destroy later, as a way of celebrating his 87,910,715th day as God of Destruction, when Marcarita came to inform him of the meeting, one of the girls threatened her, so Belmod destroyed her. Marcarita, Belmod, and Khai were then brought to Zeno's palace. He brought Toppo along with him to give him experience in dealing with the Grand Priest for Toppo's eventual job as successor to the God of Destruction.
In the anime, he was shocked when Goku turned into a Super Saiyan Blue and achieved the power of the gods. He took advantage of Top's overly-enthusiastic nature of confronting Goku so Khai convinced the two Zenos to let Toppo fight Goku, hoping Toppo would eliminate Goku before the Tournament.
In the manga, he participated in the Exhibition Match alongside the other Gods of Destruction, and attacked Beerus along with them, after being saved by Sidra, Belmod kicked him down - noting that Beerus was not the only opponent and they did not have the luxury of assisting each other. Afterwards, he pretended to be knocked down by a stray attack to avoid taking damage and furthermore participating for the entirety of the fight between the Destroyers until the Grand Minister halted the battle.
After the exhibition matches, Belmod talked with both Khai and Marcarita about the upcoming Tournament of Power on his home planet. They later went to recruit Jiren and the rest of the Pride Troopers and promised him the wish of the Super Dragon Balls to motivate him to enter. In the manga, Belmod was relieved after this, telling Khai he does not know what they would have done if Jiren had turned them down.
In the anime, during the God of Destruction meeting, Belmod confidently said that Universe 7 doesn't stand a chance against his Pride Troopers. During the Tournament of Power, he is one of the few deities that is not worried. However, after six Pride Troopers are eliminated, he started showing concern. During Hit and Dyspo's fight, Belmod was confident that Dyspo will beat Hit. After K'nsi is eliminated, Belmod is once again concerned, however, Khai tells him that with Toppo and Jiren, they have nothing to worry about.
After Dyspo was caught by Maji-Kayo, Belmod momentarily panicked before Jiren stepped in and effortlessly dispatched the latter. Regaining his composure, he noted with Jiren they couldn't lose the tournament.
Very soon, Belmod ordered Jiren to crush Goku as the latter complied and Belmod watched his pride trooper overwhelm the Saiyan. However, he is speechless along with the other Gods of Destruction after learning Goku obtained Ultra Instinct and lands a series of blows on Jiren. He then calms down as Goku's power wears off and Jiren easily dispatches him. Belmod continues to observe the Tournament of Power. When Universe 11 and Universe 7 are the only remaining teams, he boasts that his universe's strength is on an entirely different level than Universe 7.
However, he shows great concern over Dyspo's struggles in his fight and is shocked when he gets knocked out. Belmod marvels at Toppo finally deciding to become a God of Destruction, and observes his fight. However, he grew increasingly irritated when Toppo began struggling in his fight against Vegeta. He later reveals Jiren's life story.
Belmod and Khai taunt Goku's inability to master Ultra Instinct, but soon begin to grow concerned from Vegeta's words on Saiyans continously breaking their limits in the tournament causing Belmod to order Jiren to eliminate Goku as quickly as possible. As they continue to watch the intense battle, Belmod remains confident in Jiren's power but is slowly growing more nervous as he sees Goku being accustomed to the form. Both Belmod and Khai are then dumbstruck as Goku indeed achieves the complete Ultra Instinct transformation against Jiren. Despite Goku attaining Ultra Instinct, Belmod was still stubbornly confident that Jiren would win, but was later incredulous upon seeing Jiren being overwhelmed by Goku in the process. After Goku was being ravaged by the effects of Ultra Instinct, Belmod frantically ordered Jiren to knock Goku off the stage and tell him that he will get the Super Dragon Balls if he does. Belmod was then shocked upon seeing Frieza and Android 17 still in the ring and orders Jiren to quickly get rid of them as there is not much time left.
When Team Universe 11 was defeated, Belmod is erased by the Zenos. He is later revived with the rest of Universe 11 when Android 17 uses the Super Dragon Balls to resurrect all of the universes that were erased.