When Sirius die... Because his one of my favorite and his the one who harry considered as next to a parent.. and also When Dumbledore because for what i observe or my opinion he always makes harry feel comfortable and see the truth(well except when he is not looking at harry's eyes during harry's 5th year)... To be honest i cried in both incedent and i edont know i just can stop my tear even i read it many times i still cry...