How to remove jaggies of 3d silhouette animated model?

Hi everyone! I am making a game with silhouette art style. Some thing like the Vector game. I use a 3d model for the character. However, I can’t get rid of the jaggies. Does anyone know any solution for this?

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This game is for mobile, btw. So AA would not be an option.
The jaggies aren’t too noticeable on the pic. But view it here to see.

anti-aliasing is the name of the algorithm used to eliminate those jagged, pixelated lines. Alas, I don’t know how to specify what type and how much anti-aliasing to use in unity.