In Attack on Titan, Titan Shifters are awe-inspiring forces of destruction. But if placed in the world of My Hero Academia, where 80% of people have Quirks, their dominance fades. While their size and regenerative powers remain impressive, they become just one of many powerful abilities.
The specialized, combat-ready Quirks of heroes often outmatch the Titans’ brute strength, and their vulnerable nape becomes a clear liability. This analysis highlights how Titan Shifters, though still formidable, would likely rank lower in the power hierarchy, revealing how narrative context shapes the perception and impact of power across universes.
Disclaimer: This article is a speculative theory and reflects the writer's opinion.
How the Cart, Female, and Attack Titans from Attack on Titan would struggle in My Hero Academia

The Cart Titan, while offering enhanced endurance and the ability to remain transformed for months, would likely rank as low-tier in the MHA universe. Its lack of combat specialization puts it at a disadvantage against even mid-rank Pro Heroes. Mt. Lady's Gigantification Quirk already replicates the Cart Titan's primary advantage— size— while offering better control and versatility.
Similarly, the Female Titan, despite Annie Leonhart's impressive fighting skills and limited hardening abilities, would struggle against specialized combat Quirks. Heroes like Mirko could match her agility and striking power without sacrificing size advantage, while those with elemental Quirks could exploit the Titan's vulnerabilities from safe distances.
The Attack Titan falls into this same category despite its fighting spirit. Without its future memory abilities, which require specific circumstances to activate, it's essentially just a 15-meter class fighter with above-average combat skills— impressive, but not overwhelming in a world where people like Endeavor can generate fire hot enough to incinerate buildings.
Threat assessment of Titan Shifters from Attack on Titan in the My Hero Academia universe

The Jaw Titan, with its exceptional speed, climbing abilities, and hardened claws and teeth that can break even the hardest Titan crystals, poses a more significant threat. It would likely require coordination from multiple Pro Heroes or a specialized combatant like Hawks or Edgeshot to neutralize effectively.
The Armored Titan presents an interesting case. While its hardened armor provides significant protection, the MHA universe has numerous Quirks specifically designed for penetrating defenses. Characters like Nejire Hado with her Wave Motion Quirk, or Bakugo with his concentrated explosions, could potentially breach its armor with sufficient application of force.
The Beast Titan's capabilities vary wildly depending on its inheritor. Zeke Yeager's version, with its incredible throwing accuracy and range, would require Top 25 Pro Hero intervention, potentially ranking it alongside villains like Muscular in terms of threat level.
The Warhammer, Colossal, and Founding Titans as ultimate threats in My Hero Academia

The Warhammer Titan stands as one of the most formidable, capable of creating weapons and structures from hardened Titan flesh while protecting its user remotely. This combination of versatility and defense would require strategic intervention from Top 10 Pro Heroes, possibly even a team led by someone of Endeavor's caliber.
Finally, the Colossal Titan and Founding Titan represent catastrophic threats in the MHA universe. The Colossal's 60-meter height and nuclear transformation make it comparable to natural disasters rather than typical villains.
The massive release of energy and ongoing steam emissions would devastate urban environments, requiring the highest level of hero response— likely including the Symbol of Peace, All Might himself.
Conclusion

When Titan Shifters from Attack on Titan are placed into the world of My Hero Academia, their once-terrifying power is diminished. While their massive size and regeneration remain notable, they become just another ability in a society filled with diverse and specialized Quirks. Lacking the adaptability and training of professional heroes, most Titan Shifters would struggle strategically.
Their critical weakness— the vulnerable nape— makes them easy targets for agile, high-powered opponents. This contrast highlights how power scaling is deeply influenced by each universe's unique rules and worldbuilding, showing that strength is relative to the narrative context in which it's presented.
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