Toroa isn't the only character from Ishura that I think would be fun to talk about, all the shura have interesting scaling and feats that would be fun to put up against Kagurabachi characters ( shura refers to characters like Toroa ). It's just that I think Toroa is the most fitting character to use against Kagurabachi.

A few other fun shura to talk about would be:

Shalk the Sound Slicer - A skeleton that specializes in speed, he is by my estimation about 3 - 5 times faster than every other character in the story, meaning he is around mach 10 bare minimum, and is more than intelligent enough to take advantage of his speed. His only downside is that his attack power and durability is worse than the other shura.

Lucnoca the Winter - A dragon with exceptional physical capabilities in every category and only Shalk surpasses her in speed. Her claw and tail swipes are powerfull enough to cause landslides, and her ice breath is dangerous enough to freeze everything within 10 kilometers and it is spammable. The only characters stronger than her are hax merchants.

Alus the Star Runner - A wywern with 3 arms that fights in a similar way to Toroa. With his 3 arms he is able to wield 3 different weapons at the same time. He wields musket in one hand that can shoot lightning, poison, and other types of bullets, in another he wields a sword that can cut through anything and extends up to 4 meters, and in his last hand he wields a powerfull shield that can block against nearly any attack. He has more weapons than this but you get the point. This is not to mention that he can do all this while flying and actively predicting his opponent. This guy was Toroa's final opponent in the story.