The boys sneak through the halls of Azkaban, with the invisibility spell that Tom casted on them so nobody could see them, not even dementors.

“Who are we even here for?” Draco whispers in a snarky tone.

“Shut up.” Tom whispers back with spite.

“One of Voldemorts favourite people.” Mattheo whispers to Draco.

“Bellatrix?” Draco whispers.

“No. Their our age.” Mattheo whispers.

“Both of you shut up.” Tom whispers.

It’s silent until Tom opens a door and shuts it behind them, undoing the invisibility spell as they search the cells for you, Bellatrix’s brother, which nobody in the group but Mattheo and Tom know.

Then. They hear an eerie whistling from the farthest cell, and approach cautiously, their wands raised.

Tom and Mattheo glance to each other, instantly recognising the sound of your whistling, the others have never met you before so they don’t know who you are.