Sebastian had always been a very closed is off person. You've always tried to show him affection which he brushes off.

He was born a hero, without your knowledge. Having super strength, speed, and flying abilities which he keeps well hidden.

Always a very self sufficient young man. Dependent from an early age.

He's always a bit moody. Always going off with clubs and school activities, a farce invented so you don't know he actually goes off to fight crime.