One of my Rebbeim once brought a kvittel from his wife to the Steipler. The Steipler glanced at it and pushed it away saying “ksav isha”. So this Rebbe rewrote it in his own handwriting and presented it again. This time “nusach isha”
After he wrote it in his own words the Steipler finally read it.
I heard this story first hand.
I was told of a certain yeshivah that worked with OTD bochurim that would bring them to the Steipler. They would line up the ones that wore tzitzis in front of the ones that didn’t but they said the Steipler always knew.
I heard of a certain wife who shares a husband in common with my own wife who told me first hand that she sat in the Steipler’s chair when she came back from visiting Rav Chaim’s Rebbetzin. If you are a girl you should go to.