They fell in love with a game character

They traveling 

You played with his feelings

Your brother who switched you to stay on your cell

Your son's father

Ace, Sabo and Luffy living with a ghost 

Luffy is known for his optimistic, carefree, and cheerful personality. He is a laid-back boy.

Sabo is a kinder older brother than Ace. He recognized Luffy's powers and even encouraged his improvement. He helped Ace and Luffy understand each other when they were fighting, thus being the most friendly and diplomatic of the trio. Even so, Sabo was just as mischievous and mischievous as his brothers. 

Ace was confident and fearless when confronting his opponents.