First, let’s talk about the characteristics of a Thinblood. They are the last generations of vampires (the 14th and 15th). Their bloodline is extremely diluted. So diluted that they must spend twice the amount of blood points to use their disciplines, and a portion of their blood must go toward waking every night. Thinbloods have a hard time embracing others and, if their childe survives the embrace, they often do not wake up as a vampire until a while later. Weird, right?
But all Thinbloods are part of a bloodline, or a group of vampires who share a common lineage. There are bloodline-specific clans, as we saw in the Bloodlines videogame, that share common traits specific to only one bloodline. Malkavians, for example, are insane. Gangrel can change physical form. Nosferatu fell off the ugly tree and hit every branch on the way down.
As a whole, a clan is just one of the 13 major vampire groups that share common characteristics passed on by blood.
A vampire can’t change their lineage, so a vampire will always belong to the same bloodline as their sire, but traits, disciplines, and culture within the bloodlines themselves can change with each passing generation. If you’ve played the first Bloodlines, you might remember meeting Jeanette in the Asylum for the first time. If you play as a Malkavian, she says to you, ‘you’ve got it bad,’ meaning you’re one of the crazier Malkavians in your clan. Yes, they can have varying levels of crazy.
Also, bloodlines can be created in a variety of ways: Mythical methods, divergent evolution, drinking all of another vampire’s blood, or via a flawed embrace, meaning that a new vampire didn’t inherit any characteristics of their sire’s clan.