I currently play MapleRoyals on my girlfriend's computer when I stay at her place. After watching me play, she is now interested in making her own account and trying the game out herself. Is there a way we can do this without getting banned (possibly some form of white-listing)? Would I not be able to play on her computer with my own accounts once she creates one herself? Disclaimer: She hasn't created any accounts yet and has never played before, we wanted to double-check the rules first before she does anything.
You're allowed to share a device to play the game. You just need to be very careful about not logging on at the same time, otherwise you'll be flagged for account sharing. As for a whitelist, there's the voting whitelist.
