Cyrus Hemlock's Links
They are dorm roommates. Cyrus manipulates Beryl into believing they're friends, to get closer to Nirvana.
They are dorm roommates. Beryl considers Cyrus a good friend.
Cyrus is, essentially, Nirvana's apostle. Unlike her, he was raised knowing his exact purpose in life, which is to aid Nirvana's powers through whatever means necessary. He knows far more about her than she does herself, even more than Nox does.
Nirvana is very much intimidated by Cyrus, but is emotionally reliant on him for both affection and knowledge. Aside from Beryl, he is the only one who willingly approaches her. She knows that HE knows things, but... just isn't aware how much.