Synesthesia – The character can see sound and/or hear light as well as having other types of cognitive substitutions that make the character more powerful.
Literary Critique of Synesthesia
Emma Coolidge (Heroes) can see sound waves.
Rautym can feel sound and hear light in TSR 2145 Monstrous Compendium Annual Volume 1.
Jack Beans has synesthesia in A Calculated Man #1 (Aftershock).
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