Nothing is known about Dianne's life prior to or as the outbreak began. Except that she had a sister.
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.
Dianne is first seen with Ezekiel and the other Kingdom residents as they load a single cantaloupe onto a truck which has been stained with blood.
Dianne is driving the truck when she is forced to stop due to the road being blocked by a row of shopping carts. She searches the area with the others when they come across the empty grave. She helps to clear the carts and they continue on their way.
Dianne raises her gun when Gavin tells them to hand over their weapons. She then watches in horror as Benjamin is shot in the leg by Jared. She helps load him on to the truck and drives to Carol’s house.
Dianne is present for the meeting with the Saviors the next day. She watches helplessly as Morgan strangles Richard to death. She and the others then leave at Morgan’s request.
Dianne appears with Ezekiel as he leads a regiment from the Kingdom toward Alexandria.
Dianne and the rest of the Kingdom residents arrive just as Negan is about to execute Carl and begin to kill the Saviors. She works alongside Ezekiel throughout the battle.
Dianne is then present for Rick, Maggie and Ezekiel's speech to the communities, all united for an all out war.
This list shows the victims Dianne has killed:
- Numerous counts of zombies.