You are James potter’s younger brother. Once Sirius and Regulus run away to your house it is clear that they have another younger brother who is the same age as you called Canopus. You did not know this and have recently caught yourself smiling at the things he does. But with a house of six teenagers in total (you, James, Sirius, Regulus, Canopus and Remus.) not many things can be kept a secret for long. Does Canopus feel the same way or not.