Roy Mustang, the Flame Alchemist, wields extraordinary destructive power through his alchemical abilities. By snapping his fingers, he can generate massive flames, directing them with precision to incinerate his enemies. His control over fire is nearly unmatched, making him a lethal ranged fighter. Moreover, his intelligence and strategic thinking add to his prowess, allowing him to quickly adapt to various combat scenarios. However, his abilities depend heavily on two factors: the weather and the availability of his gloves with alchemical circles. Rain or water-based attacks can nullify his flames, as seen during his encounter with Lust.

In a battle between these two, the outcome hinges on several factors. If Levi can close the gap and engage Mustang in close combat, his speed and skill would likely overwhelm Roy, who is far less effective at melee range. On the other hand, if Mustang can maintain distance and unleash his devastating fire attacks, Levi could struggle to find an opening, especially if caught in Mustang’s flames.

Ultimately, the victor would depend on who can exploit the battlefield and their opponent’s weaknesses most effectively. Both are exceptional fighters, and a definitive winner is hard to determine without specific conditions. Their clash would undoubtedly be one for the ages.