Baldur's Gate 3 contains several companions that players get to add to their party and take along for the story. In order to get closer to each of them, players will need to complete their personal quest chains.
Baldur's Gate 3: How to Find Other Vampire Spawn (The Pale Elf Quest)
Along Astarion's personal quest in Baldur's Gate 3, players need to find some of his siblings in order to find his vampire master, Cazador.