She's is shown to be significantly more cheerful and energetic than her male counterpart.
Most social links do not have condition other than only being present in specific days in a week.
Shinjiro is also a nighttime link, which leaves the heroine more room to work on other ones.
To avoid this situation, revise your line up before you leave Tartarus so that you will have the right personae for the upcoming few days.
Unfortunately it was fixed in 4 and Portable.
Atlus has since build a around the two titles note Quite similar to how responded to Final Fantasy 7's popularity.
Come and he's running a shady commodities shop that possibly deals in illegal things.
In Persona 3, most Social Links can be reversed through the aforementioned methods, and dialogue choices that will lead to a broken link are difficult to figure without a guide.