As an Ootori, I was taught that other people only existed for one's benefit.
These lines were essentially my life principle until I reached the end of middle school.
[Images were from Episode 17("And So Kyouya Met Him" wink of our anime and Chapter 33 of our manga]
Never take a stranger's advice
Never let a friend fool you twice
Nobody's on nobody's side
Everybody's playing the game
But nobody's rules are the same
Nobody's on nobody's side
--
...I've come a long way, haven't I?