Ooo someone wants spoilers, hmmm... OK backstory bits that won't spoil anything.

1. Due to his mutation, Duo burns up 3 times the normal number of calories at rest, and 10 times that when using his powers.
2. When not actively using the systems Heero plays battleships with Zero or Cerebro whenever he gets bored. The currently the computers lead by 245-197 matches.
3. Warren Worthington III was once engaged to one of Quatre's sisters. He broke it off after he became CEO of Worthington Industries.