Here are some MHA-style names fitting the "Blank Slate" Quirk description, categorized for different stylistic approaches:

Hero Names (Emphasizing Loyalty & Reliability):

• The Paragon: Simple, strong, and suggests unwavering morality.
• True Copy: Highlights the Quirk's copying ability while hinting at authenticity.
• The Emissary: Suggests a messenger or representative, implying a connection to others' powers.
• Custodian of Quirks: A more formal name, emphasizing responsibility and guardianship.
• Reflector: A subtle name suggesting the mirroring or reflection of other Quirks.
• The Synthesist: Highlights the creative aspect of combining and adapting Quirks.
• Apex: Suggests reaching the peak of power through the Quirk.
• Vanguard: Implies leading the way and protecting others.

Anti-Hero Names (Reflecting the Darker Aspects):

• The Mimic: A more sinister take on the copying aspect of the Quirk.
• The Thief of Quirks: Direct and emphasizes the stealing aspect.
• The Borrower: A more subtle and less aggressive name for stealing Quirks.
• The Forger: Suggests creating false or altered versions of Quirks.
• Null: Simple and mysterious, hinting at the potential for both creation and destruction.
• Void: Similar to Null, but emphasizes the emptiness or absence of a fixed identity.
• Renegade: Highlights the rebellious and anti-hero nature of the character.
• Shadow Weaver: Suggests manipulation and control over others' powers.

Villainous Names (Highlighting Power & Control):

• The Arbiter: Suggests absolute control and judgment over Quirks.
• The Architect: Implies designing and manipulating Quirks for personal gain.
• The Collector: Focuses on the accumulation and hoarding of Quirks.
• The Override: Suggests forcefully taking control of others' powers.
• The Parasite: Emphasizes the parasitic nature of stealing and using others' Quirks.
• The Tyrant: A straightforward name suggesting oppressive power.
• The Maestro: Suggests skillful manipulation and control of Quirks.
• The Weaver of Fate: A more dramatic name, suggesting control over destiny through Quirks.

Names Incorporating Japanese Elements:

• Kage-utsuse (影写し): Japanese for "shadow copy," reflecting the Quirk's ability.
• Tokusei-ka (特性化): Japanese for "characteristic transformation," hinting at the Quirk's transformative nature.
• Ryūsei (流星): Japanese for "shooting star," suggesting a fleeting and powerful presence.
• Tenkū (天空): Japanese for "sky," suggesting vast potential and reach.

Remember to consider the character's personality and backstory when making your final choice. The best name will be one that resonates with the character's essence and the overall narrative.