No, you get a near infinite supply of "crystals" that you can create your blades from. There is a random chance that you will get a "named blade" which is a pre-created character with their own catchphrases and special set of quests (also way better than generic blades.) The random nature of it is that once you get a blade linked to one character you cannot* reassign them to another character, and certain blades work best with certain characters. Thus perfectionists/minmaxers save and reload to get blades lined up the way a guide tells them to instead of just playing the fucking game, which isn't even all that hard regardless of which blades are linked to which player characters.