Saras is supposed to look like his mom, but he got his dad's mannerisms too. Best of mom and dad makes Sary the perfect little baby Vyas š³ awww. Saras acts all dignified and mature like dad, but is caring and loving like mom.
Example:
KUMUD! - When he says with authority and stands up to her - pure LN
Please maat roo tum - Pleading with Kumud not to cry because he can't see her pain - pure Saraswati
Good job choosing the actors! Baby Saras and his mom are very similar looking and you can imagine him growing up to look like the present Saras.