>shadariafags are trying to hijack the trifecta
This won't end well for you

>>528046054
>Ohshima
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Sonic’s Character Specification (Personality & Behavior)

This was more of a team effort, but mainly driven by:
Yuji Naka (Programmer/Game Lead)

Naka wanted a character who moved fast — gameplay first.

That "speedy" behavior became a core part of Sonic’s personality: impatient, bold, energetic.

He made Sonic tap his foot if the player was idle — that iconic "bored" animation reflected Sonic's impatience and attitude.

Hirokazu Yasuhara (Game Designer)

Helped shape Sonic’s behavioral identity through gameplay and level design.

Created stages that reinforced Sonic’s characteristics: momentum, speed, risk/reward choices, etc.

SEGA of America’s Marketing Team

Especially important for Sonic's personality and lore outside of Japan:

Gave Sonic a "cool" Western attitude — confident, rebellious, likes rock music, hates water.

Created early backstory material (like the "Freedom Fighter" versions used in Sonic SatAM and Archie comics).

So who defined Sonic's character (as in how he behaves)?

Core in-game behavior and attitude: Mostly shaped by Yuji Naka and Hirokazu Yasuhara

Visual style and identity: Naoto Ohshima

Expanded personality and lore (especially for the West): SEGA of America