Quintus and his siblings are an attempt at introducing TWB genes to the CreatureLink genepool and generally reviving this section of CreaturesCaves. His father, Victoro, was bred exactly 82 times to various firstgen TWB females over the course of his life, but only seven offspring survived to adulthood and were able to breed naturally. Even the few norns uploaded to CreatureLink are not perfect, most of them being constantly cold for no reason and/or experiencing delirious anger and fear when crowded.
As Quintus was mostly left alone while growing up and I really don't feel like sitting through the long freeze I currently experience when importing norns, I don't know exactly what he's like. However, I do know that he is capable of fathering children without the use of aphrodisiacs and living a happy life.
Since there is only one other creature on all of CreatureLink besides Victoro's offspring, make absolutely sure that you breed Quintus and upload his children to CreatureLink if you choose to adopt him!