Sirius Black
Sirius drags up the memory of James, Lily and Harry in their living room. Harry flying on his first broom, levitating off the ground and Lily hovering anxiously.
"Expecto Patronum," Sirius said, holding onto fleeting happiness. It worked and a silver fawn materialized.
Sirius stared. The fawn waited patiently.
"Remus, it's me," Sirius said. "I know it's not a dog, it's not a grim, but listen-" he swallowed thickly, hoping his voice worked, that his words were understood. "James and Lily are dead and I-" Sirius could feel the tears flowing his cheeks. He continues on. "Harry is alive. Need to protect him. Peter betrayed us all. He's not at his home. Help me-" Sirius took in a deep breath, the words feeling like stone in his chest. "Help me kill Peter and protect Harry?"
The fawn Patronous goes. Sirius held his head in his hands and broke down.