Adhlea, Mithra, and Bora were found by Solas on the March's border when they were very young pups. They had obviously been abandoned, and with no sign of who brought them or any idea where they might have originally come from, Lavellen decided to take them in. The girls all look very similar and it's possible that they're sisters despite a suspected slight difference in age, but no one really knows for sure. They refer to themselves as sisters anyway and are very close.