Daar is a silver dragonborn. She is daughter of Nala, a blue dragonborn and Kriv, a silver dragonborn. They are all quite tall and have pale hair - Nala blue-white, Kriv silver. Daar's skin is mostly silver with a bit of blue and her hair is silver-white. They all have blue eyes. Nala has fine traits, while Kriv contributes to more bulky features to the family. Daar is more on the bulky side herself.
The brothers and sisters vary a bit in appearance.
The two elder are fraternal twins. They are both silver dragonborn, just a bit shinier in the silver direction. They are identical, but it's easy to distinguish them : Torinn's hands are more worn from manual labor. He dresses practically for docks and ships. His twin Shedinn is more well-dressed for his administrative functions, and his hands are finer. The shape of their faces is fine for dragonborns, not bulky.
Donaar is a blue dragonborn. He ressembles her otherwise - even has the same bulkier face shape, although older of course. He is more reasonable than Daar and calm. Quite her model, but a lot less into adventure. Singing is his thing, but he is not interested in magical music. He might be the first to give Daar a nephew or niece, seeing how he wants a family. You'd have to ask him if he met anybody on his travels next time he comes by Waterdeep.
Jheri is a blue dragonborn. Biri is a silver dragonborn. The two sisters are muscular and well trained. You would usually see them in the watch's armor and suit, or practically and neatly dressed when off duty. The shape of their faces is more fine than bulky, but less fine than the twins.
Korinn is a blue dragonborn. She is ornamentally dressed, like Shedinn. Her jaw is more of the bulky type, but her body is very feminine.