Question: are all the angels in dbs related?
Answer: In case you didn't know or forgot, the Grand Minister is the father of several Angels, which include Whis, Vados, and Cus. Vados is the elder sister of Whis, and she is the attendant of God of Destruction Champa - the brother of Beerus, whose attendant is Whis, make it quite the sibling affair.