The reason why he has attitude problems is because he is quite insecure due to his lack of experience on the outside world, especially in social situations.
He doesn't want anyone to know about his insecurities so he hides it with his attitude.
He doesn't really have much geniune friends. They either tolerate him due to his money or he's easy to be taken advantage of.
Nick heavily resents his parents for always mistreating him and made him doubt himself.
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DC hcs and lore (?) about my aus
RandomMy personal headcanons about the characters, ships and more info about my aus
