key animator; lead animator
Refers to a senior animator responsible for key frames in animation production, often overseeing the visual style and quality.
He works as a key animator at a famous animation studio.
The lead animator for this work also handled the character design.
Compound of 原画 (key frame, original picture) and 家 (specialist, expert). The term likely emerged in the animation industry to denote a senior artist responsible for key frames.