You will want to unlock and complete as many Social Links as possible in Persona 3 Reload to gain access to various gameplay perks. Persona 3 Reload hints at when Social Links become available, but some of them require several steps before they can be initiated. One example is the Temperance Social Link, represented by foreign exchange student, Bebe. You'll need to start the Hierophant Social Link and reach a specific Rank before you can formally meet Bebe. After this, you'll want to start working on building the protagonist's Academics Social Skill, which is the final lock in getting Rank 1 of the Temperance Social Link.