She helps her mother in law in doing all household chores. Also Ashiwini aai is shown quite old so Sai understands she needs her help
She also participates in her college festivals, cultural programmes and take care of family too at the same time
Sai never hesitates to call a spade a spade be it elder or younger.
For family's happiness she let's go of her free time to do household chores, gives up her sleep and is willing to bend.
Sai is selfless and she helps those who are kind to her (pulkit, devi tayi, Shivani bua, Ashwini aai)
She initiated studying even after marriage.
She doesn't believe in woman's Life ends after divorce
She believes everyone has chance to live their life independently (the way she supported Shivani bua)
She never lived in a joint family still she tries her best to win hearts of all the family members.
Her husband Virat motivates her to study and she takes time out of her schedule to converse with him as she finds happiness in small late night conversation about her dreams, aspirations.
She gets socially adjusted with everyone in her college
She's focused but not selfish
Sai apologized to Pakhi without no fault of hers just because she saw Pakhi hadn't eaten.
She gave the ruby pendant to kaku because kaku wanted the one for herself which she mentioned it to virat about it. So to keep her husband's head high she gave it to kaku..The thought that Virat remembered her likes and bought the pendant for her mattered her the most
In intial episodes, we saw hoe Sai was ready to fight with family to prove Virat's innocence as knew the importance of respect and reputation it holds for an IPS officer
Even when it comes to money, she will always be dependent on herself
Losing her father paved her way to her becoming stronger
She put aside her self respect to bring back Pakhi in turn becoming a big person.
There were more which I just gave instances from the scenesscenes orally what all came in my mind.