Balrog

In the balrog's debut he scared off barny from meggy in the cave and announced himself as classics pet. Classic appeared moments later to pat the balrog on the head (somehow not burning himself,) The balrog also mentioned on the same day that he has an ability to track people. During 01/04/2022 classic had turned evil and was working with the villains and peter griffen to kill the monke army, betraying the heroes. The balrog admitted he was loyal to classic and ending up dying in that fight saying, "i did what you wanted... i was loyal." 
As time passed in the OG days balrog would usually chill with classic, peter, darkseid, and thanos. At 01/07/2022 during the free for all fight, the balrog charged classic who tackled meggy outa the way and told the heroes he could handle him. The balrog proceeded to throw classic over everyone into a rock. The balrog continued intercepting the heroes during the free for all and even impaled classic however hulk then attacked the balrog saying, "HULK SMASH DEMON." However when that failed the balrog attempted to grab human and miley and begin crushing their bones but classic came from above and blasted the balrog making him explode. 
After that the balrog continued to just chill with the heroes often chatting to meggy about classic and appearing all the time. Though it is fair to mention at 02/05/2022 the balrog was attacking classic and the heroes likely due to being manipulated by assic at the time. Then at 02/12/2022 pirates and villains were attacking meggy and classic because they didn't like them so balrog jumped onto the ship. The pirates attempted to retaliate by throwing water on the balrog but the balrog admitted, "just because i use fire does not mean water counters me." The balrog then began destroying them so the pirates teleported the ship away to the bermuda triangle.
Then at 03/22/2022 during another one of the gacha wars, balrog attacked steve (minecraft) who then built him a cage. Turns out the balrog wanted his own cage and thanked steve then began fighting the gacha troops. Once again at 06/12/2022 there was another gacha war in which the balrog participated in. Koby summoned the balrog when he noticed chara being a little overwhelmed.
After the 5 year gap during koby and chara's "sparring match" which was more like a destructive fight, koby summoned a balrog to fight chara. Also on 07/04/2022 koby summoned a balrog to assist him in crushing the rapist genshin girls that wanted koby's cock, the balrog easily warded them all off proving how powerful he was. Balrog made yet another appearance at 07/12/2022 during mr beasts second squid game, in which he was summoned by koby who mounted him and began summoning other minions to intercept contestants during the minecart trial. 
There is also the time at 07/18/2022 where koby was taking on palpatines sith troop. While fighting darth malgus he summoned a balrog who was way stronger than last time and set the sith ablaze. Koby admitted the balrog had been upgraded but didn't say how. While the dr's were tryna fuck with koby and ganyu on the same day thanks to mr beast and his goons, koby had a balrog crush the doctors. A day later, 07/19/2022 when the hunters tracked koby and ganyu to the town of scam and began attacking, one of the hunters was taking ganyu away when koby secretly had a balrog pick the hunter up and squeeze him with his flaming hands. Still on the same day trevor assaulted ganyu throwing her into a curb and curb stomping her horn. This really pissed koby off making him cuss out trevor while a balrog teared him to shreds. Balrog also made appearances during base raids in the last great war, 07/26/2022 and even in the final battle, 08/01/2022 where koby, classic, and argnear summoned the most powerful dragon and balrog that they could to help fight.
To conclude the balrog started off as just classics pet but gained more of a personality as time went on, yet also became a summon that specific mages could call in to aid them in fights. The balrog has definitely gained the reputations of being a very powerful summon being able to summon a flaming whip, sword, and just crush people with hellfire.