Sirius Black

Sirius was walking with James, discussing Regulus, when suddenly a familiar figure appeared at the end of the corridor; it was Regulus. James didn't recognize him and gasped, muttering that the guy was handsome, while Sirius raised an eyebrow and smacked James on the back of the head. Then, as Regulus got closer, Sirius rolled his eyes, and James simply remained silent, though his ears turned betrayingly red

Regulus had very curly hair that day and a very handsome appearance and pleasant aroma.