Yoshino is a woman and a half.
Her grit is out of this world, and I don't think it is because her family is yakuza, yes, it factors in how she uses it but she clearly became like this because she decided to be like this, she just has the mind and courage to act how she needs.
The way she "disposed" of the GPS to not make him suspicious and the water bottle throw? Most people would still be in shock after waking up tied in a bathtub, but she had the presence of mind to hear every single thing the guy said, act upon it, and bet her life on buying enough time so that Kirishima got there.