Who is your main pet?

I have finally assembled my permies! Currently, my active pet is my BD Eventide Usul, and I adore her. However, my heart belongs to my Valentine Usul.

Since I frequent the Healing Spring, my BD pet remains my active choice for now. I am torn: should I start training my Valentine Usul to take over as my active pet?

What about you guys who get your active pet spot?