I've look up that only Invaders are allowed SIRs so I thought since Baya is a explorer maybe at some point she could come across a lonely orphan alien pet she could adopt. One of those is Solace A alien dog like creature. It was around 10 years ago when Baya was about to descend to another planet when she came across a lone egg, she was hoping that it's mother would come by to get it but it never did. Feeling bad she took the egg with her that later hatch into this odd looking creature she kept. Just like any other dogs Solace is Loyal, Playful, full of energy, protective and enjoys spending time with it's owner. When it or it's owner feels threaten it slowly mutates into a taller and more threatening version of itself. This creature at first seems like it doesn't have the ability to see but it can in fact see in inferred. Solace has always been a very helpful pet to Baya during her journeys, protecting her when something tends to attack. Once Baya came to the planet Earth it's disguise is a Shepherd.
Baya also has another pet, a Bird like Alien but I couldn't really think of a design for it so at the moment we have Solace here.