Depression happens day and night. In a family facing what so ever
Who do you think is the most depressed person in the family?
Could it be the eldest son?
What is the fact behind your reasons?
Everyone can be depressed in the family, it's normal there's no specific person. In a family where there's love and unity you can hardly see anyone being depressed because they share things in common and support each other.
In a family where there's competition and hatred, the one that's at his lowest get depressed most times, and when it's heated ,he can grow jealousy which can be destructive in the family. Family should share love and unity, don't let anyone discourage the love in the family. Brother she watch out for each one, there's no gain seeing your brother in pain or depressed.