Some additional Lupine options I've created

Lupine origins

Lupine origins emerge from the curse of lycanthropy not fulling taking effect or other bestial magics or curses. The Lupine Origin Table offers suggestions for your Lupine origin

D6

1. You were attacked by a lycanthrope while they were transforming, ensuring the curse never fully took hold
2. You are the child of a lycanthrope and a non-lycanthrope
3. An old begger asked you for help, you refused, the begger then revealed themselves to be a fey mage and turned you into a lupine as punishment
4. You are the child of 2 lupine parents
5. You were turned into a lupine by a mad scientist experiment
6. You became a lupine due to a recessive gene in your family

Lupines in the Domains of Dread

When creating a lupine, , consult with your DM to see if it's appropriate to to tie your origins to one of the following Domains of Dread

Barovia: While many fear the wolves and werewolves of the Svalich forest, many Lupine see the Svalich forest as a place of sanctuary and build hidden villages within these haunted woods where they hope against hope that Strahd and monster hunters won't find them.

Kartakass: With it's werewolf haunted woods and dangerous performances that often end in werewolf attacks, Kartakass has produced a large number of Lupine who make no effort to hide their identities. This makes them both a small case of honesty, and hated pariah's.

Tempest: While not as common as Lupine who became who they are with botched lycnthropy, some Lupine became monsters for upsetting fey creatures. From not giving them the proper respect, to being outright cruel, and even festivities gone wrong.