All For One (AFO) is not a single quirk, but rather a quirk that allows the user to steal and use other quirks. Therefore, a hero with "All Quirks" would be incredibly overpowered and require a name reflecting that immense power and potential threat. Here are several name suggestions, categorized for different stylistic approaches:

Names Emphasizing Power and Omnipotence:

• Omnipotentia: A direct and powerful name, clearly indicating the character's vast abilities.
• Quirkus Rex: Suggests a kingly dominance over all quirks.
• The All-Quirk: Simple, direct, and impactful.
• Polymorph: Highlights the ability to shift and change, reflecting the many quirks possessed.
• Archon of Quirks: Evokes a sense of supreme authority and control.
• The Quirk Weaver: Suggests the ability to manipulate and combine quirks.
• Synergist: Focuses on the ability to combine quirks for synergistic effects.
• The Kaleidoscope: Represents the vast array of abilities.
• Unison: Implies the harmony and control over multiple quirks.
• Apex Predator: Positions the hero as the ultimate being in the quirk world.

Names Emphasizing Control and Responsibility:

• Custodian: Highlights the responsibility of wielding such immense power.
• The Harmonizer: Suggests the ability to balance and control the various quirks.
• Equilibrium: Represents the balance between power and responsibility.
• The Regulator: Focuses on the control and management of the quirks.
• Sentinel: Implies a protective role, despite the immense power.

Names with a More Subtle Approach:

• Aether: Suggests an ethereal and powerful presence.
• Zenith: Represents the peak of power and ability.
• Kairos: Refers to the opportune moment, suggesting precise control.
• Chrysalis: Implies a transformation and potential for even greater power.

Names with a Japanese Influence (fitting the MHA style):

• Zen-Oh (全王): Meaning "All King" in Japanese, a powerful and fitting title.
• Ichigen (一元): Meaning "One Source," suggesting the origin of all quirks.
• Bansei (万世): Meaning "Myriad Generations," hinting at the vastness of power.
• Tenchi (天地): Meaning "Heaven and Earth," representing immense scale.

The best name will depend on the specific nuances of your character's personality and story arc. Consider which name best reflects their role, their approach to using their powers, and their overall impact on the narrative.