So I know Toon_Loon has an OC named Diane who is Dick's sister, but I had too made a sister OC named Diane before knowing about hers but I asked and she said it was ok
So I finally designed her : let me introduce you to Diane de Law born Dastardly, the only daughter of Machines Dick and the youngest of her siblings WR Dick, Dread Baron and Desdemona's dad. She is a brilliant but corrupted, dishonest lawyer who cheats on law mercilessly to win all her cases and is often an influence (good or bad depending who she is defending) on her son Longarm, who reached very far thanks to her (and her pressure) from the start, easy with a deadbeat submissive husband (a sheriff she manipulated from the beginning to reach a high ground). Very ambitious and vile, she is no different from her brothers cheating her own way but unlike them manages to succeed, often helped by her pet Siamese cat i am yet to name

Wacky Races © Hanna Barbera and Warner Bros
Drawing, idea, theories, Diane and her cat © me