Asa's Links
Asa and Gideon were born in the same litter and were experimented on at the same time. She doesn't have a full relationship with her brother, but he does pass her mind every now and then. However, there's a lot of resentment built up over the years after Gideon left Asa behind in the custody of their unstable creator.
Being the strongest pup in the litter, Gideon never took Asa seriously or payed much attention to them growing up, especially during the experiments. They were close for a short while, then distant for reasons unknown. After Gideon escaped, the two have barely spoken.