Nothing is known about Dianne's life prior to or as the outbreak began.
Dianne attends the feral pig hunt with Ezekiel, Morgan, Benjamin, Richard, Alvaro, and Jerry. After the pigs are herded into a garage, Dianne shuts the door in order to trap the pigs inside. She is then tasked with retrieving the truck to load up the pigs. After the pigs are loaded up in the truck, she returns to the Kingdom with the others. Later, she is present at the exchange with the Saviors and begins to explain to Morgan who the men are until he interrupts, stating he knows about the Saviors. She raises her weapon after Jared attacks Richard, but the situation is diffused by Ezekiel.
Dianne is at the Saviors exchange with Ezekiel and the rest of his court, waiting for Gavin and his band of men to arrive. A zombie stumbles into the vincinity and Dianne comments that the zombie is wearing the same dress her sister has. She puts it down with an arrow to the head just as the Saviors arrive. After the heated exchange with the Saviors, Dianne comments again on the zombie and the dress before heading back to the Kingdom. She is later present when Ezekiel and other Kingdom soldiers arrive at Carol's house to deliver a casserole.
This list shows the victims Dianne has killed:
- Numerous counts of zombies.