Denji is a teenage girl with scruffy short blond hair. She has yellow-brown eyes and bags underneath, resulting in a dazed and tired expression. Her teeth are noticeably sharp and angular. due to the stress of what she did for a living, she’s often mistaken for being older than she actually is. After Denji forms a contract with Pochita, her heart is fused with Pochita, a chainsaw cord forms in the middle of her sternum and she gains a athletic build.